M45 F8 Mechanical Moon Phase Hand Winding
RE-BW0008B
| Movement | Mechanical |
|---|---|
| Calibre Code | F8A62 |
| Accuracy | +15 seconds to -5 seconds per day * |
| Power Reserve (Mechanical) | Over 70 hours |
| Power Reserve (Quartz) | |
| Automatic | |
| Hand-Winding | Yes |
| Dial Colour | Black |
| Case Material (Bezel) | Stainless steel (SUS316L) |
| Case Material (Body) | Stainless steel (SUS316L) |
| Case Material (Back) | Stainless steel (SUS316L) |
| Case Size (Width) | 39.5 mm |
| Case Size (Height) | 46.7 mm |
| Case Size (Thickness) | 11.9 mm |
| Case Back Design | See-through exhibition caseback |
| Glass Material (Front) | Dual curved sapphire crystal (AR coating) |
| Glass Material (Back) | Sapphire crystal |
| Strap Material | Cordovan |
| Strap Colour | Black |
| Strap Width | 20 mm |
| Buckle | Trifold deployant buckle with push button |
| Wrist Size | 150 mm~190 mm |
| Additional Strap | |
| Additional Strap material | |
| Additional Strap buckle type | |
| Water Resistance | 3 bar (30 m) |
| Magnetic Resistance | JIS Type 1 (Magnetic Resistance 4800 A/m or higher) |
| Weight | 79 g |
| Jewels | 20 |
| Date Indicator | |
| Day Indicator | |
| Power Reserve Indicator | Yes |
| GMT | |
| Retrograde | |
| World Time | |
| Rotating Bezel | |
| Inside Ring | |
| Luminous Light | |
| Screw Case Back | Yes |
| Easy Exchange Strap | |
| Other Details | |
| Limited Edition | 75th Anniversary Limited to 140 pieces |
| Pair Model | |
| Country of Origin | |
| Warranty | 3 years |
| Launch | Sep, 2026 |
- The indication difference of the watch measured over a 24-hour period represents the degree of advance or delay per day.
Indicated with (+) if the watch is going forward,and (-) if it is going backward.
A Scene of Serenity Produced by Shinshu Watch Studio

Crafted by the Shinshu Watch Studio based in Shiojiri in Japan’s Shinshu region, the dial is inspired by the theme of “the moon drifting through clouds.” Nanoparticle metal multilayering technology*1 is used to express the clouds spreading across the dial’s surface and stars shimmering from within. The variations in intensity and gradation of colour create a distinctive sense of depth and shifting light, evoking slender clouds crossing a clear autumn sky and moonlight filtering through the gaps between them. The dial depicts the tranquil passage of time beneath a quiet night sky. * The granted patent related to nanoparticle metal multilayering technology: Japan: patent no. 7639981.
New Moon Phase Display with Three-layered Construction

The moon phase display visible through the clouds on the dial features a new, patent-pending three-layered construction comprising a lustrous metal plate adorned with scattered stars against the backdrop of a night sky, a mother-of-pearl moon motif plate, and a moon phase drive wheel. The unique iridescence of the mother-of-pearl is used to exquisitely portray the moon’s gentle radiance.
An Evolved Movement

The in-house calibre F8A62 is a slim hand-winding movement with moon phase and power reserve displays, equipped with an in-house silicon escape wheel that offers over 70 hours of power reserve. The movement features a carefully designed bridge shape that allows the blue escape wheel, Geneva stripes evoking star trails, and a crescent-shaped window to be viewed through the see-through caseback, reflecting meticulous attention to detail throughout.