Watch
Orient Star M45 F7 Mechanical Moon Phase Stainless Steel White Open Heart Dial Automatic RE-BT0005S Men's Watch
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The Orient Star M45 F7 Mechanical Moon Phase RE-BT0005S is a sophisticated men's automatic watch that blends classic Japanese watchmaking with modern elegance. Designed for collectors and enthusiasts who appreciate both substance and style, this timepiece offers a refined aesthetic suitable for both daily wear and dressier occasions.
Featuring a crisp white dial with elegant Roman numerals, the watch provides timeless legibility. Its stainless steel case and bracelet ensure durability and a polished look. The in-house F7M42 automatic movement is a highlight, visible through an open heart complication, showcasing the intricate mechanics within.
This Orient Star model stands out with its trio of complications, offering both practical functionality and visual appeal. It's a statement piece for those seeking a sophisticated moon phase complication combined with daily reliability and enduring design.
- Movement: In-house F7M42 Automatic
- Complications: Moon Phase, Open Heart, Power Reserve Indicator
- Water Resistance: 50m (5 bar)
- Case Material: Stainless Steel
- Dial: White with Roman Numerals
Specifications
- Brand
- Orient Star
- Model/Ref
- RE-BT0005S
- Gender
- Men's
- Display
- Analog
- Movement
- Automatic (F7M42)
- Power Reserve
- Over 50 hours
- Case Size
- 41mm
- Case Material
- Stainless Steel
- Dial Colour
- White
- Band Material
- Stainless Steel
- Lug Width
- 20mm
- Clasp
- Butterfly Clasp
How it works
What this watch’s key specs actually mean on the wrist.
Automatic
Automatic (self-winding) movement
A weighted rotor spins as your wrist moves, winding the mainspring so the watch never needs a battery. The seconds hand sweeps in a smooth glide rather than ticking. Wear it regularly and it keeps running; set it down for a day or two and you simply give the crown a few winds. It is the traditional, collectible heart of mechanical watchmaking.
50m / 5 ATM
Water resistance
Rated to 50m / 5 ATM — fine for a shower, a rainstorm or a quick dip in the shallow end, but not for real swimming laps or diving.
50-hour reserve
Power reserve
Fully wound, this movement stores about 50 hours of running time when it's off your wrist. Enough to comfortably carry it overnight without resetting the time. Power reserve is simply how long the mainspring keeps the watch going once you stop wearing it.
41mm
Case size
The case measures 41mm across (excluding the crown) — a modern, present size with real wrist presence, at its best on medium-to-larger wrists. Case size is the single biggest factor in how a watch actually wears, so it's worth picturing against your own wrist.
Stainless steel
Case material
Stainless steel is the all-rounder for good reason: tough, corrosion-resistant, and easy to refinish if it ever picks up a scratch. 316L is the marine-grade alloy used across quality watchmaking — durable enough for daily life and smart enough to dress up.
Frequently Asked
What type of movement does the Orient Star RE-BT0005S use?
The Orient Star RE-BT0005S is powered by an in-house F7M42 automatic mechanical movement, meaning it is self-winding and does not require a battery.
What is the water resistance of this watch?
This watch has a water resistance rating of 50 meters (5 bar), making it suitable for daily life, including splashes and brief immersion, but not for swimming or diving.
What are the key features on the dial of the Orient Star RE-BT0005S?
The dial features a moon phase complication, an open heart revealing the movement, and a power reserve indicator, alongside elegant Roman numerals.
What is the case size of the Orient Star RE-BT0005S?
The case size of this Orient Star watch is 41mm, offering a balanced and dress-friendly profile.
What material is the watch case and band made from?
Both the watch case and the bracelet are crafted from durable stainless steel, providing a sophisticated silver-toned finish.
How long is the power reserve for this automatic watch?
The Orient Star RE-BT0005S boasts a power reserve of over 50 hours, ensuring confident wear for more than two days without needing to be wound or worn.
This piece ships through our authorized dealer network. Any applicable customs or import fees are collected up front at checkout, so nothing extra is owed when your order is delivered.
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