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The Orient Star RE-AY0107N pairs a moon-phase and date display at 6 o’clock with a semi-skeleton aperture, power-reserve indicator and an in-house automatic movement. Its black dial has a flowing-water motif, and the UK listing pairs it with a black Cordovan leather strap. Orient Star’s published specifications make it a distinctive complication-led dress watch; they do not establish how it wears, performs on the wrist or compares in value with similarly priced watches.
What is the Orient Star RE-AY0107N?
The RE-AY0107N is an Orient Star Mechanical Moon Phase model listed in the brand’s M45 F7 line. Orient Star describes the range as a refined version of its flagship design. The official UK product page lists this reference with a black dial and black Cordovan leather strap. Its flowing-water dial motif and several display elements give the face more visual activity than a conventional three-hand watch.
The layout is organized around four features: a semi-skeleton aperture at 9 o’clock, power-reserve indicator at 12, and moon-phase and date displays at 6. Small seconds are also listed among its functions. The moon phase is a mechanical display indicated by Orient Star; the available specifications do not describe its adjustment procedure or accuracy over time.
Movement and stated performance
Orient Star specifies its in-house F7M62 automatic movement, with hand winding, hacking seconds and 22 jewels. The brand gives the power reserve as 50 hours and the accuracy specification as +15 to −5 seconds per day. These are manufacturer-published figures, not independently measured results for a reviewed sample.
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The reserve indicator at 12 o’clock provides a visual indication of remaining power, a useful complement to an automatic watch that can stop after being left unworn. The documentation establishes the stated reserve, but not the movement’s observed timekeeping, durability or service interval.
Case size, materials and crystal
Orient’s listed dimensions are 41.0 mm across, 49.0 mm lug-to-lug and 13.8 mm thick, with a 20 mm lug width. The case is stainless steel; the brand’s announcement specifies SUS316L. The UK listing identifies the strap as black Cordovan leather. A 20 mm width gives a clear measurement for replacement-strap shopping, though the attachment compatibility of any particular strap should be checked.
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The official announcement specifies a dual-curved sapphire front crystal with SAR coating and a sapphire caseback. Those material details describe the construction, not a hands-on assessment of reflections, scratch resistance or finishing quality.
RE-AY0107N specifications
| Specification | Orient Star listing |
|---|---|
| Reference and line | RE-AY0107N; Mechanical Moon Phase, M45 F7 |
| Movement | F7M62 in-house automatic; hand winding and hacking; 22 jewels |
| Power reserve | 50 hours, manufacturer specification |
| Stated accuracy | +15 to −5 seconds per day, manufacturer specification |
| Case | Stainless steel; SUS316L specified in the announcement |
| Dimensions | 41.0 mm wide; 49.0 mm lug-to-lug; 13.8 mm thick |
| Lug width | 20 mm |
| Crystal | Dual-curved sapphire with SAR coating at the front; sapphire caseback |
| Displays and functions | Moon phase, date, small seconds, semi-skeleton aperture and power-reserve indicator |
| Strap | Black Cordovan leather on the UK listing |
| Water resistance | 50 m, manufacturer specification |
Water resistance and practical limits
Orient lists water resistance at 50 m. This is the published rating, not an independently tested result, and it should not be read as evidence of a particular sample’s current condition. The available official specifications do not establish how the watch performs after wear, how well it suits a given wrist, or how its accuracy behaves in daily use.
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- Set Includes: Main unit, box,
- Drive type: Mechanical (hand wind + self-winding)
- Accuracy: +25 seconds to -15 seconds per day
- Operation time: 50 hours or more (with power reserve indicator)
- Country of Origin: Japan (Made in Japan)
Price and availability
At the time of the cited UK product-page snapshot, Orient listed the RE-AY0107N at £1,695.99 and marked it “Not In Stock.” That is a regional, time-specific listing—not a current global price or a guarantee of ongoing stock status. Check the live listing and confirm the exact reference, strap configuration, seller and applicable regional warranty before purchasing.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Is the Orient Star RE-AY0107N worth buying?
The RE-AY0107N is most compelling for someone who specifically wants an Orient Star with a moon-phase display, date, power-reserve indicator and semi-skeleton dial, rather than a simpler time-only watch. Its published specifications offer a clear picture of the movement, dimensions and materials. Whether it is worth its asking price depends on current local pricing and personal preference; the available information does not establish a same-price competitor advantage, actual wrist comfort or independently observed performance.
Rank #4
- Set Includes: Main unit, box,
- Drive Type: Mechanical (self-winding, hand-winding)
- Time accuracy: +25 seconds to -15 seconds per day
- Operation time: 50 hours or more (with power reserve indicator)
- Country of Origin: Japan (Made in Japan)
Before deciding, compare the live price and availability in your region, the 41.0 mm width and 49.0 mm lug-to-lug against a watch you already wear, and the features you will actually use. If independent timekeeping, water-resistance or comfort evidence is important to you, the manufacturer specifications alone cannot answer those questions.
Sources: Orient Watches UK product page; Orient Star Mechanical Moon Phase announcement and specifications; Orient Star product catalog.
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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.
