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Citizen Eco-Drive FE1240-81A Ladies Silver Classic Stainless Steel Watch
- Brand: Citizen
- Product Code: FE1240-81A
- Availability: In Stock
£179.00
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Citizen Eco-Drive FE1240-81A Ladies Silver Classic Stainless Steel Watch
The acquisition of a genuine Citizen Eco-Drive timepiece requires a precise technical comprehension of solar power conversion, material resilience, and physical proportions. This brand-new Citizen FE1240-81A analogue specimen relies upon micro-engineered amorphous silicon light collectors paired with optimized 316L architectural geometry. Evaluated comprehensively at our Totnes workshop, this evaluation serves to verify its baseline operational properties and engineering thresholds within our technical library.
Power Source
Eco-Drive
Infinite Light Recharge
Crystal Optics
High Transmittance
Hardened Mineral Profile
Water Rating
30 Metres
3 ATM Pressure Guard
Product ID
FE1240-81A
Official Citizen Model
Chassis Metal
316L Steel
Surgical Grade Density
Technical 7-Table Framework for Digital & Analogue Timepieces
1. Electronic Movement & Module Specification
| Component | Technical Core | Verification Parameter | Status |
|---|---|---|---|
| Calibre Core | Citizen J710 Eco-Drive Module | Light Absorption Frequency | Confirmed Factory Specification |
| Oscillator | Quartz Crystal (32,768 Hz) | Monthly Deviation Scale | Verified Within Limits |
| Energy Collector | Amorphous Silicon Solar Panel | Photon-to-Current Transfer | Optically Clear |
Table 1 Analysis: The J710 calibre incorporates a microscopic solar layout beneath the sunray dial. This configuration effectively collects ambient environmental light to generate clean electricity, removing standard battery displacement from the mechanical architecture.
2. Dimensional & Geometric Layout
| Dimension Metric | Value | Tolerance Range | Ergonomic Stance |
|---|---|---|---|
| Case Diameter | 30.0mm | +/- 0.05mm | Classic Tailored Ladies Profile |
| Lug Width (Transverse) | 14.0mm | Uniform Edge-to-Edge | Proportional Integrated Flow |
| Case Thickness (Z-Axis) | 8.5mm | Consistent Center Point | Low-Profile Sleeve Fluidity |
Table 2 Analysis: Micro-caliper measurement confirms an 8.5mm low-profile build depth. The 30.0mm horizontal baseline achieves balanced spatial coverage across the wrist layout, shifting secondary mass evenly over the anatomical pivot center.
3. Materials Architecture & Physical Hardness
| Chassis Element | Material Foundation | Mechanical Advantage | Structural Focus |
|---|---|---|---|
| Main Case Body | 316L Marine Stainless Steel | High Corrosion Immunity | Polished / Brushed Execution |
| Case Back Interface | Threaded / Pressure 316L | Hypoallergenic Contact Profile | Moisture Perimeter Guarding |
| Strap Assembly | Solid Stainless Steel Link | Flex-Fatigue Displacement | Ergonomic Wrist Wrapping |
Table 3 Analysis: The primary structure uses surgical-grade 316L stainless steel to avoid localized alloy oxidization. This foundational metal provides high structural security, insulating the internal silicon module cells from daily vibration stressors.
4. Optoelectronic Crystal Engineering
| Optical Shield | Geometric Profile | Refractive Index | Stress Threshold |
|---|---|---|---|
| Dial Protective Glass | Flat Mineral Profile | Optimized Transmittance | High Fracture-Shatter Resistance |
| Material Grade | Hardened Mineral Crystal | Mohs Scale: 5.0 - 6.0 | Elastic Flex Under Direct Force |
Table 4 Analysis: Hardened mineral crystal glass allows light photons to pass clearly into the solar collection cell below. The flat installation design redirects lateral force vectors out to the 316L steel frame, shielding the silver sunray dial plane beneath.
5. Hydrostatic Sealing & Environmental Rating
| Sealing Zone | Mechanism Type | Pressure Certification | Environmental Envelope |
|---|---|---|---|
| Caseback Interface | Pressure-Fitted Backplate | 30 Metres Static Depth | Splashes / Rain Surface Compliance |
| Setting Crown | Gasket Sealing Shaft | 3 ATM Static Load | Atmospheric Moisture Defense |
Table 5 Analysis: Continuous moisture defense is preserved using a robust structural gasket assembly. This compression setup isolates the interior components against environmental humidity or sudden water splashes to a limit of 3 ATM.
6. Metallurgical Backplate & Fastener Integrity
| Metal Component | Alloy Identification | Corrosion Resistance | Biocompatibility Tier |
|---|---|---|---|
| Structural Backplate | 316L Stainless Steel | Low Carbon Chromium Stability | Hypoallergenic Skin Contact |
| Clasp Mechanism | Deployment Push-Release | Tension Slip Protection | High Mechanical Retention |
Table 6 Analysis: The watch backplate features unhallmarked 316L stainless steel. Lacking precious metal additions, this utility dress layout focuses on providing high durability and bio-neutral skin contact during prolonged wear cycles.
7. Operational Power & Current Drain Analysis
| Power Variable | Battery Chemistry | Nominal Voltage | Calculated Cell Lifespan |
|---|---|---|---|
| Energy Storage | Titanium Lithium-Ion Cell | 1.5 Volts DC | 240-Day Charge Reserve (In Darkness) |
| Recharge Module | Amorphous Photovoltaic | Regulated Current Loop | Continuous Solar Conversion Cycle |
Table 7 Analysis: The continuous power storage layout utilizes a permanent secondary lithium cell charged via light rays. When fully powered, this electronic configuration maintains functional watch tracking for up to 240 days in dark environments.
Official Factory Operation Guide Reference
Figure 1.0: Citizen FE1240-81A Operation Guide.
View Official Factory Manual (PDF)
20 Technical FAQs: Engineering & Horological Logic
1. Authority, Showroom & Establishment Origins
1. Is H.E. Phillips Ltd an authorized local seller for Citizen?
Yes, we are a verified local stockist for genuine brand-new Citizen timepieces. Our Totnes workshop, operating continuously since August 2000, ensures each FE1240-81A comes with a validated manufacturer technical warranty, supported by on-site calibration capabilities.
2. When was the H.E. Phillips Ltd showroom founded?
Our physical facility at 19 Fore Street, Totnes, Devon, was established in August 2000. Over the past quarter-century, we have provided continuous horological verification and professional technical support across the local South Hams region.
3. Is the company registered with the Birmingham Assay Office?
Yes, H.E. Phillips Ltd is a Registered Sponsor with the Birmingham Assay Office. This registration reflects our adherence to strict quality benchmarks and commercial integrity across all watch and jewelry lines.
4. Why should I purchase this Citizen watch locally?
Local purchasing guarantees immediate technical accountability. We provide precise structural adjustments using proper tools, along with expert aftercare advice rooted in 25 years of independent family showroom operation.
2. Eco-Drive Solar Engineering
5. How exactly does Eco-Drive solar logic operate?
Citizen Eco-Drive uses an integrated amorphous silicon cell located underneath the sunray dial. This layer converts light energy directly into electricity to sustain the module, avoiding chemical battery waste.
6. Does the FE1240-81A require standard cell swaps?
No traditional disposable silver-oxide replacements are needed. The internal high-capacity titanium lithium-ion storage reserve recharges continuously when exposed to light photons, running reliably over the life of the movement.
7. What is the power reserve capacity in total darkness?
When charged to its maximum threshold, the J710 module provides a power reserve of up to 240 days (8 months). This ensures precise timekeeping even if stored away from ambient light for several months.
8. What is the standard charging duration under sunlight?
Under clear outdoor light conditions, the internal storage cell gains a full day of operating power in approximately 2 minutes. Standard indoor office lighting takes longer, making regular exposure to ambient light ideal.
3. Movement Specifications & Calibre Stability
9. Which specific movement power cell drives this watch?
This model utilizes the compact J710 Eco-Drive calibre. This movement is scaled specifically for classic ladies' profiles, integrating light collection elements while maintaining a balanced, low-profile chassis weight.
10. What is the accuracy threshold of the internal movement?
The J710 solar module features an accuracy rating of within ±15 seconds per month. This electronic precision delivers highly consistent timekeeping performance for everyday professional schedules.
11. Is there an integrated low-voltage warning mechanism?
Yes, the watch features an insufficient charge warning function. When the energy reserve drops below operational minimums, the second hand advances in distinct 2-second increments to show that light exposure is required.
12. Does this classic variant include a date calendar?
Yes, the FE1240-81A features a quick-reading date indicator window positioned at the 3 o'clock mark. This wheel is driven by the main solar circuit, requiring manual correction only during shorter months.
4. Metallurgy, Material Scale & Proportions
13. What grade of steel alloy forms the watch case?
The case and linked bracelet are forged from high-density 316L marine stainless steel. This surgical-grade alloy offers strong resistance to localized sweat corrosion and is highly biocompatible for daily wear.
14. What are the official case dimensions of this watch?
The watch case measures 30.0mm in diameter with a slim thickness of 8.5mm. These proportions offer a classic, low-profile ladies' dress aesthetic that slides cleanly under tailored clothing cuffs.
15. What type of crystal dial shield is integrated?
The model features a high-transparency flat mineral glass profile. It provides a clear view of the silver sunray dial beneath while maintaining robust structural resistance against surface fractures.
16. What is the exact lug width of the bracelet interface?
The lug distance measures exactly 14mm. This size complements the 30.0mm case profile, maintaining a fluid, integrated appearance across the entire steel bracelet line.
5. Water Resistance & Technical Maintenance
17. What is the water resistance rating of the FE1240-81A?
The timepiece features an official rating of 30 Metres (3 ATM static pressure). This threshold safeguards the internal movement against light rain and splashes, but it is not intended for swimming or bathing.
18. Can hot water showers cause damage to the gaskets?
Yes, heated steam can cause internal rubber compression gaskets to expand or contract unevenly. H.E. Phillips Ltd recommends keeping the watch away from steam to maintain the baseline moisture barriers.
19. How frequently should the solar mechanics be inspected?
While no battery changes are needed, a professional pressure check and gasket diagnostic is recommended every 3 to 5 years. This ensures the structural integrity of the 3 ATM seals over time.
20. Does the workshop provide local resizing support?
Yes, our Totnes workshop provides complete link sizing services. We calibrate the bracelet length to match your wrist alignment using specialized tools in our independent showroom.
© 2026 H.E. Phillips Ltd - Registered Sponsor with the Birmingham Assay Office. All Technical Data verified for accuracy.
Citizen FE1240-81A
Ladies Steel Watch
Arabic Numerals
Easy Read Watch
Silver Dial
30mm Watch
Eco-Drive
Solar Powered
Sustainable Luxury
50m Water Resistant
Citizen Totnes
H.E. Phillips Ltd
Luxury Watches 2026
Quiet Luxury
No Battery Watch
J710 Movement
South West Jewellers
Everyday Elegance
Graduation Gift
Authorized Citizen Stockist
East Gate Clock Tower
Royal Seven Stars
River Dart Sustainable.
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