The Orient Star M45 F7 Mechanical Moon Phase is a Classic Collection M45 model family introduced in 2025. One documented reference, RE-AY0107N, pairs a moon-phase display with a 50-hour automatic movement, a power-reserve indicator and a semi-skeleton dial. Its dimensions, strap and displayed U.S. price below apply specifically to RE-AY0107N—not automatically to every M45 F7 variant.
What is the Orient Star M45 F7 Mechanical Moon Phase?
It is a mechanical moon-phase watch in Orient Star’s Classic Collection M45. Orient Star describes the line as “a refined version of ORIENT STAR’s most symbolic flagship featuring a new in-house movement with a 50-hour power reserve.” The manufacturer’s description is on the RE-AY0107N official product page.
Epson announced three new M45 F7 Mechanical Moon Phase models on September 3, 2025, with a scheduled release date of October 16, 2025. That launch timing refers to those three announced models, not every watch in the wider M45 family. The announcement is in Epson’s September 2025 release.
RE-AY0107N specifications
The following details are for the exact reference RE-AY0107N, as listed by Orient Star.
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#1 Best Overall
- This is a panoramic large aperture moon phase automatic mechanical watch designed by Swiss chief designer Etienne Ruffieux, inspired by the sun, moon, and stars. Precision‑engraved moon disc with daily lunar cycle display, fully presenting the entire cycle of nature's waxing and waning phases. The watch was honored with the Italian A' Design Award for its outstanding original design. It is an automatic large moon phase mechanical watch brimming with the romantic charm of celestial bodies.
- In-house CAL.A4610 fully automatic mechanical movement, bidirectional automatic winding system, 28,880 vibrations per hour, 27 ruby bearings. Exquisite perlage and geneva stripes finishing, edge chamfering process, white gold plating, and engraved gold-plated brand logo highlight exceptional high-end craftsmanship.
- In-house CAL.A4610 fully automatic mechanical movement. Enhanced power reserve technology delivers an extended 80-hour power reserve (twice that of standard mechanical movements). This technology enables a more even and gradual release of the mainspring, resulting in more precise and stable timekeeping.
- Before AGELOCER introduced its panoramic moon phase watch with a large aperture, traditional moon phases were displayed through small windows. This groundbreaking 28.5mm large aperture moon phase design pioneered the industry's first panoramic moon phase watch. To power the large moon phase disc and prevent the dial from shifting due to wrist movement inertia during wear, the design team spent hundreds of hours on repeated testing.
- They completely re-engineered the watch's reversing and drive mechanisms, thickened the toggle spring, and boosted the power output of the rotating disc—using sophisticated R&D to counteract inertia. This technology is now protected by a Chinese utility model patent.
| Specification | RE-AY0107N |
|---|---|
| Movement | Mechanical F7M62; automatic winding with hand winding |
| Accuracy | Static specification: +15 to -5 seconds per day |
| Power reserve | 50 hours |
| Case | SUS316L stainless steel; 41.0 mm wide, 49.0 mm from 12 to 6 o’clock, and 13.8 mm thick |
| Crystal and caseback | Dual-curved sapphire crystal with SAR coating; sapphire exhibition caseback |
| Strap and clasp | Black cordovan strap, 20 mm wide; pusher three-fold clasp |
| Water resistance | 5 bar (50 m stated on the product page) |
| Other listed features | Moon-phase function with attached adjusting tool, power-reserve indicator, 22 jewels and second-hand stop |
| Guarantee | Two years |
Orient Star labels the accuracy figure as a static specification. It is not a guarantee that the watch will gain or lose that amount each day on every wearer’s wrist; real-world performance can vary with conditions and use.
How the dial displays the time and moon phase
On RE-AY0107N, the semi-skeleton aperture is at 9 o’clock, the power-reserve indicator at 12 o’clock, and the moon-phase and date display at 6 o’clock. The moon-phase adjusting tool is supplied attached, according to Orient Star. These positions and details describe this reference; other M45 F7 models may differ.
Rank #2
- Set Includes: Watch, box, and warranty card included RPA2023 Drive System: Mechanical (hand winding and self-winding)
- Accuracy: Daily difference + 25 seconds to -15 seconds
- operating time: 40 hours RPA2023 Country of Origin: Japan (Made in Japan)
How much does RE-AY0107N cost, and where can you buy it?
Orient Star’s U.S. product page displays a price of $2,195. Treat that as the figure shown on the page, not a confirmed current street price: the page also carries a notice that the U.S. official online store would discontinue online purchasing at 10:00 AM JST on June 1, 2026. Availability and the purchase route may therefore depend on region and date. Confirm the current listing and authorized sellers before buying.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Does every M45 F7 Moon Phase have these specifications?
No. RE-AY0107N is a documented example, not a specification stand-in for the entire M45 F7 family. Epson’s announcement establishes that three models were introduced in 2025, but the available details here do not provide a current, complete side-by-side specification and price comparison for all three. Check the exact reference when comparing dial, strap, movement, dimensions, water resistance, warranty, availability or price.
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Best Value
- SMALL BUDY, BUT VERSATILE:Quality brand original automatic tourbillon style relojes de hombre(watch); without a battery; calendar,waterproof, moon phase function
- LUMINOUS WATCH,EASY TO READ TIME,EVEN IN THE DARK:Fashion design men's mechanical watch, black case with clear golden lines and golden hands, let you read the time easy; The hands will be grow when in the dark, which let you can read the time even in dark
- WATER RESISTANT TO 30M:Waterproof:In general, withstands splashes or brief immersion in water ,but not suitable for hot water bathing or diving. Please do not press any buttons in the water
- NO BATTERY NEEDED:Automatic mechanical movement, Powers with the mechanical movement, without a battery. Operate the watch, to wind-up please whirl the button on the clockwise (Don't need to pull out, just in normal condition.) for 15 to 20 complete revolutions
- NICE PRESENTS:Stylish mechanical germen watch, it fits good and looks fantastic, elegant holiday present sure to be given some compliments by business colleagues and clients, friend. Also, it is nice present for your friends and family as a Father's Day present
Rank #4
- This is a panoramic large aperture moon phase automatic mechanical watch designed by Swiss chief designer Etienne Ruffieux, inspired by the sun, moon, and stars. Precision‑engraved moon disc with daily lunar cycle display, fully presenting the entire cycle of nature's waxing and waning phases. The watch was honored with the Italian A' Design Award for its outstanding original design. It is an automatic large moon phase mechanical watch brimming with the romantic charm of celestial bodies.
- In-house CAL.A4610 fully automatic mechanical movement, bidirectional automatic winding system, 28,880 vibrations per hour, 27 ruby bearings. Exquisite perlage and geneva stripes finishing, edge chamfering process, white gold plating, and engraved gold-plated brand logo highlight exceptional high-end craftsmanship.
- In-house CAL.A4610 fully automatic mechanical movement. Enhanced power reserve technology delivers an extended 80-hour power reserve (twice that of standard mechanical movements). This technology enables a more even and gradual release of the mainspring, resulting in more precise and stable timekeeping.
- Before AGELOCER introduced its panoramic moon phase watch with a large aperture, traditional moon phases were displayed through small windows. This groundbreaking 28.5mm large aperture moon phase design pioneered the industry's first panoramic moon phase watch.
- To enable the watch to drive the large moon phase disc and prevent it from shifting due to wrist movement inertia during wear, the design team spent hundreds of hours on repeated testing. They refined the watch’s anti-reverse mechanism and drive train, strengthened the setting spring, and boosted power transmission to the rotating disc. With sophisticated R&D, this design effectively counteracts inertia. This technology is protected by a China Utility Model Patent.
Rank #3
- 59 teeth gear for 29 ½ Days MoonPhase Display
- Gold Swan Neck
- Column Wheel Chronograph
- Blue steel screws
- Exhibition Case Back Cover
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
