Citizen Military Men's Eco-Drive Watch
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The Citizen Eco-Drive is a rugged military-inspired field watch built for everyday reliability. Featuring a clean black dial, durable stainless steel case, and comfortable green nylon strap, it delivers timeless style with Citizen's light-powered Eco-Drive technology—so it never needs a battery replacement.
Key Features
- ☀️ Eco-Drive technology powered by any light source
- ⚫ Black dial with luminous hands and Arabic numerals
- 🛡️ 37mm stainless steel case with screw-back design
- 🎖️ Durable green nylon strap for all-day comfort
- 💎 Scratch-resistant mineral crystal
- 📅 Day & date display at 3 o'clock
- 🌊 100M (10 Bar) water resistance
Specifications
| Model | BM8180 |
| Movement | Eco-Drive Solar |
| Case Size | 37 mm |
| Case Material | Stainless Steel |
| Crystal | Mineral Crystal |
| Strap | Green Nylon |
| Water Resistance | 100M (10 Bar) |
SIZE GUIDE
Find your fit below. All measurements are body measurements, not garment measurements – if you're between sizes, we recommend sizing up for a more relaxed fit.
DRESSES, TOPS & SETS
| Size | UK Size | Bust | Waist | Hip |
|---|---|---|---|---|
| XS | 6 | 32" | 24–25" | 34–35" |
| S | 8 | 34" | 26–27" | 36–37" |
| M | 10 | 36" | 28–29" | 38–39" |
| L | 12–14 | 38–39" | 30–31" | 40–41" |
| XL | 16 | 40–41" | 32–33" | 42–43" |
| XXL / 2XL | 18 | 42–43" | 34–35" | 44–45" |
| 3XL | 20 | 44–45" | 36–37" | 46–47" |
HOW TO MEASURE

BUST
Measure around the fullest part of your chest, keeping the tape level.
WAIST
Measure around your natural waistline, at the smallest part of your torso.
HIP
Measure around the fullest part of your hips, roughly 8” / 20cm below your waist.
SHOES
Shoe sizes on our product pages are listed in AU/EU format.
Use the table below to find your equivalent US or UK size.
| AU / EU | 4 / 35 | 5 / 36 | 6 / 37 | 7 / 38 | 8 / 39 | 9 / 40 | 10 / 41 | 11 / 42 | 12 / 43 |
|---|---|---|---|---|---|---|---|---|---|
| US | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| UK | 2.5 | 3.5 | 4.5 | 5.5 | 6.5 | 7.5 | 8.5 | 9.5 | 10.5 |
Versatile Day-to-Night Silhouette
Engineered for ultimate wardrobe versatility, this chic piece transitions effortlessly from elevated casual streetwear to refined evening occasions.