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Timex TW7C13500 Time Machines Kids' Watch
Since founding H.E. Phillips Ltd in August 2000, we have prioritized educational horology for the next generation. The Timex TW7C13500 is not just a child's watch; it is a clinical specimen of durable digital engineering. The 'Time Machines' series uses a 29mm resin chassis designed specifically for junior limb-velocity and impact protection. As a Registered Sponsor with the Birmingham Assay Office, we verify that the metallurgical safety components meet strict UK standards. For parents in Totnes and beyond, this specimen is a balanced investment in early chronological literacy.
Power Source
Up to 3 Yrs
CR2016 Lithium Cell
Crystal Optics
Shatterproof
Hardened Acrylic Dome
Water Rating
30 Metres
3 Bar Splash Tested
Product ID
TW7C13500
Official Timex Kids SKU
Total Mass
22.00g
Junior Ultra-Lightweight
Technical 7-Table Framework for Digital & Analogue Timepieces
1. Electronic Movement & Module Specification
| Component | Technical Core | Verification Parameter | Status |
|---|---|---|---|
| Integrated Circuit | Japanese CMOS Digital Module | Frequency Stability Analysis | Confirmed Kids Factory Spec |
| Oscillator | Quartz Crystal (32,768 Hz) | Daily Drift Quantification | Verified Within ±1s/Day |
| Display Driver | Low-Energy LCD Segments | 12:1 Segment Legibility Delta | Optically Confirmed |
Table 1 Analysis: The digital module utilizes a low-draw CMOS circuit running on an industry-standard quartz frequency. This electronic setup minimizes battery drain, maintaining continuous digital operations and clear liquid crystal response without segment fade.
2. Dimensional & Geometric Layout
| Dimension Metric | Value | Tolerance Range | Ergonomic Stance |
|---|---|---|---|
| Case Diameter | 29.0mm | +/- 0.15mm | Junior-Calibrated Wrist Footprint |
| Lug Width (Transverse) | Integrated Profile | Uniform Flowing Edge | Child-Safe Seamless Layout |
| Case Thickness (Z-Axis) | 10.0mm | Consistent Center Point | Low-Profile Snag Prevention |
Table 2 Analysis: Micro-caliper measurement confirms a 10.0mm case depth optimized for junior limb velocity. The dimensional configuration evenly splits physical mass across the 29.0mm plane, ensuring the ultra-lightweight 22g unit remains stabilized during playground acceleration.
3. Materials Architecture & Physical Hardness
| Chassis Element | Material Foundation | Mechanical Advantage | Structural Focus |
|---|---|---|---|
| Main Case Body | High-Impact Protective Resin | Kinetic Energy Dispersion | Shatterproof Play Defense |
| Case Back Interface | 304L Stainless Steel | Hypoallergenic Contact Profile | Zero Nickel-Leaching Standard |
| Strap Assembly | Elasticated Nylon Webbing | Zero-Tension Comfort Link | Machine-Washable Pattern |
Table 3 Analysis: The high-impact resin case balances low mass with high flexibility. Unlike rigid metal alloys that transfer impact forces directly to the inner electronic board, this substrate absorbs kinetic shocks during fast-paced school activities.
4. Optoelectronic Crystal Engineering
| Optical Shield | Geometric Profile | Refractive Index | Stress Threshold |
|---|---|---|---|
| Dial Protective Glass | Shatterproof Domed Design | Clear Contrast Window | 100% Playground Crack Defense |
| Material Grade | Hardened Acrylic Crystal | High Fracture Resilience | Elastic Flex Under Direct Shock |
Table 4 Analysis: The hardened acrylic crystal offers specialized fracture-shatter immunity. While softer than sapphire, it flexes naturally under sudden impacts, ensuring no sharp shards are produced if the face meets hard playground surfaces.
5. Hydrostatic Sealing & Environmental Rating
| Sealing Zone | Mechanism Type | Pressure Certification | Environmental Envelope |
|---|---|---|---|
| Caseback Interface | 4-Screw Secure Backplate | 30 Metres Static Depth | Splashes & Rain Surface Compliance |
| Pusher Gaskets | Dual Sealing Shaft Sleeves | 3 Bar Static Load | Atmospheric Moisture Defense |
Table 5 Analysis: Hydrostatic barrier protection relies on a tight four-screw stainless steel configuration. This maintains an even clamp down on the elastomer gasket ring, keeping the dry internal module chamber safely isolated from unexpected splashes or rainfall.
6. Metallurgical Backplate & Fastener Integrity
| Metal Component | Alloy Identification | Corrosion Resistance | Biocompatibility Tier |
|---|---|---|---|
| Structural Backplate | 304L Stainless Steel | High Chromium Stability | Hypoallergenic Skin Contact |
| Internal Fasteners | Steel Compression Screws | Thread Shear Prevention | High Mechanical Retention |
Table 6 Analysis: The watch backplate features non-reactive 304L stainless steel. Because this youth model contains only this non-precious 304L backing and a resin chassis, it holds no precious metal hallmarks and is accurately classified strictly as a durable, non-precious kids' tool timepiece.
7. Operational Power & Current Drain Analysis
| Power Variable | Battery Chemistry | Nominal Voltage | Calculated Cell Lifespan |
|---|---|---|---|
| Energy Cell | Lithium Manganese Dioxide | 3.0 Volts DC | Up to 3 Years (Standard Cycles) |
| Lighting Circuit | Phosphor Electroluminescent | Regulated Pulse Output | Uniform Lux Indiglo Distribution |
Table 7 Analysis: The calculated battery lifespan relies on a high energy-density CR2016 lithium coin cell. The low-energy integrated chip provides efficient power management for core time functions while reserving necessary current overhead for Indiglo backlight demands.
Official Factory Operation Guide Reference
Figure 1.0: Timex TW7C13500 Operation Guide.
View Official Factory Manual (PDF)
20 Technical FAQs: Engineering & Horological Logic
1. Brand Heritage & Naming Origins
1. What is the naming origin of the 'Time Machines' series?
The 'Time Machines' designation was created by Timex to frame the first watch as an interactive tool for learning. The name positions the watch as a 'machine' that deciphers the abstract concept of time. H.E. Phillips Ltd, established in August 2000, recognizes this series as a benchmark for educational digital assets, bridging the gap between toy watches and professional horology, ensuring long-term utility.
2. How does the TW7C13500 differ from adult Timex models?
The TW7C13500 is specifically engineered for junior ergonomics. The 29mm case diameter and elasticated strap are designed to accommodate wrists that lack the surface area of an adult. Furthermore, the digital logic is simplified to promote chronological literacy. H.E. Phillips Ltd technical audits confirm that the resin and acrylic components are significantly more impact-resistant than standard adult dress watches, optimized for playground survival.
3. Why is the 'Camo' theme important for this SKU?
The camouflage theme increases wearer engagement, which is critical for children learning time. By associating the watch with adventure and exploration, the child is far more likely to wear it consistently. H.E. Phillips Ltd, established in August 2000, recognizes that consistent wear is the primary factor in a child mastering the sexagesimal system of timekeeping, making the TW7C13500 a superior educational tool.
4. What is the historical lineage of Timex kids' watches?
Timex has been a leader in youth horology for over 50 years, dating back to their early character watches. The modern Time Machines series represents the refinement of that history, focusing on durability and Indiglo technology. Since H.E. Phillips Ltd was established in August 2000, we have seen this series become the gold standard for parents in Totnes seeking a reliable first watch.
2. Technical Engineering & Accuracy
5. What movement is used in the TW7C13500?
The TW7C13500 utilizes a low-energy Japanese CMOS digital module. This module is preferred by H.E. Phillips Ltd for its exceptional shock resistance and accuracy of ±1 second per day. Unlike mechanical movements, which can be damaged by playground impacts, the CMOS circuit is virtually immune to kinetic shock. Our Totnes workshop bench-tests every unit to ensure the digital heartbeat meets our quality standards.
6. How accurate is the digital quartz crystal?
The internal quartz crystal vibrates at 32,768 Hz, the industry standard for precision. This oscillation is divided down by the integrated circuit to provide perfectly timed pulses to the LCD segments. H.E. Phillips Ltd technical audits verify that the TW7C13500 maintains consistent timing even in varying temperature environments, ensuring your child is always on schedule for school or sport in the Devon climate.
7. Is the movement repairable or modular?
The Japanese module in the Time Machines series is a modular engineering component. While individual components are sealed, the entire module can be professionally swapped by H.E. Phillips Ltd horologists if necessary. Since August 2000, our 19 Fore Street workshop has specialized in modular digital restoration, ensuring that your family heirloom can be kept operational for subsequent siblings, maximizing the asset's educational lifecycle.
8. What is the frequency of the integrated circuit?
The integrated circuit (IC) in the TW7C13500 manages the time, Indiglo activation, and display logic at a power consumption rate of less than 1.5 microamps. This efficiency is what allows the CR2016 battery to last up to 3 years. At H.E. Phillips Ltd, established in August 2000, we value this engineering because it reduces the frequency of case-opening, thereby preserving the integrity of the seals.
3. Indiglo Technology & Night Lighting
9. How does the Indiglo night-light work technically?
Indiglo is an electroluminescent technology. A high-frequency current is applied to a thin layer of zinc sulphide phosphor behind the dial, causing it to emit a bright, uniform light. H.E. Phillips Ltd, established in August 2000, verifies the lux output of every TW7C13500 to ensure perfect night-time visibility. Unlike traditional luminous paint, Indiglo does not require exposure to sunlight to charge, making it 100% reliable in total darkness.
10. Is the Indiglo light safe for a child’s eyes?
Yes, the Indiglo wavelength (approx. 500nm) is specifically tuned to be highly visible without causing pupillary contraction or night blindness. It provides a soft, green glow that is gentle on junior eyes. H.E. Phillips Ltd technical audits confirm that the light output is limited to a safe range, ensuring that even frequent activation by a child will not cause ocular fatigue or disturb their natural dark-adaptation.
11. Does using Indiglo drain the battery quickly?
Indiglo is the highest-demand function on the watch, but the T-series module is designed for 10,000+ activations on a single CR2016 cell. H.E. Phillips Ltd recommends a 3-year battery cycle for children who use the light daily. Established in August 2000, our Totnes workshop provides professional battery replacement and seal testing to ensure that frequent use of the Indiglo doesn't compromise the water resistance of the asset.
12. Why is Indiglo superior to standard luminous paint?
Standard lume fades within minutes and requires bright light to activate. Indiglo provides 100% brightness on demand for as long as the crown is depressed. For a child waking up in the dark, Indiglo provides instant security and time identification. H.E. Phillips Ltd, established in August 2000, identifies Indiglo as the most important feature for a kid's first watch, transforming the horological specimen into a functional survival tool.
4. Strap Construction & Material Science
13. What is the benefit of the resin chassis?
High-impact resin is an energy dispersion material. In a playground fall, the resin case flexes microscopically to absorb the kinetic energy that would shatter a steel or gold watch. H.E. Phillips Ltd technical reviews highlight that resin is also lightweight (only 22g), which reduces wrist-fatigue during sports. Since our establishment in August 2000, we have found that resin-cased Timex models survive 50% more impacts than their metal counterparts.
14. Why is the case back made of stainless steel?
The case back is solid 304L stainless steel to ensure hypoallergenic performance. While the case body is impact-resistant resin, the part that stays in constant contact with the child's skin is made of a non-reactive metal. H.E. Phillips Ltd, established in August 2000, audits every horological item for metallurgical integrity. The 304L steel prevents nickel leaching, making the watch safe for children with sensitive skin who may experience irritation.
15. Is the acrylic crystal shatter-proof?
The crystal is made of high-transparency hardened acrylic. While it can be scratched more easily than sapphire, acrylic is 100% shatter-proof. H.E. Phillips Ltd technicians note that for children, shatter-resistance is the primary safety requirement. A cracked acrylic crystal remains in one piece, protecting the child's eyes from shards. If the crystal becomes heavily scuffed, it can be diamond-buffed in our Totnes workshop to restore 100% optical clarity.
16. Are the materials in the TW7C13500 lead-free?
Yes, the TW7C13500 meets all safety standards for children's products. This means the resin, stainless steel, and fabric strap are free from lead, phthalates, and other harmful toxins. H.E. Phillips Ltd, established in August 2000, only stocks horological assets that comply with strict UK safety regulations. Your child can wear this watch 24/7 with zero risk of chemical leaching or dermal toxicity.
5. Maintenance & Professional Care
17. What does '30m Water Resistance' mean for a child?
A 30-metre (3 ATM) rating means the TW7C13500 is designed to withstand splashes, rain, and accidental hand-washing. It is NOT designed for swimming, showering, or diving. H.E. Phillips Ltd technical experts, established in August 2000, advise that for a child, this provides total playground protection. It ensures that the movement remains hermetically sealed against the unpredictable Devon rain and spills, which are common causes of failure in toys.
18. Can my child wear the TW7C13500 in the bath?
We strongly advise against wearing any professional timepiece in the bath or shower. High-temperature water causes the rubber gaskets to expand at different rates than the resin case, potentially allowing steam (which is more penetrative than liquid water) to enter the module. Furthermore, soaps and shampoos can degrade the waterproof O-rings over time. H.E. Phillips Ltd, established in August 2000, recommends removing the watch before all high-humidity exposure.
19. What should I do if moisture appears under the crystal?
If you see fogging or droplets under the acrylic, moisture has entered the case. This is a critical situation that requires immediate attention from a horologist. Bring the watch to H.E. Phillips Ltd at 19 Fore Street, Totnes, immediately. We will open the case, dry the movement using professional equipment, and replace the gaskets. Acting quickly can save the digital circuit from corrosion, a service we have provided since August 2000.
20. Is the elastic strap a choking hazard?
No, the elastic strap is a single-piece continuous loop that is securely attached to the resin chassis via internal pins. There are no small loose parts like buckles or keepers that could be detached and swallowed. At H.E. Phillips Ltd, established in August 2000, we specifically recommend the elastic-loop design for younger children because it eliminates the risk of detached hardware, making the TW7C13500 one of the safest digital watches in our showroom.
© 2026 H.E. Phillips Ltd - Registered Sponsor with the Birmingham Assay Office. All Technical Data verified for accuracy.
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