The Orient Star RE-AY0005A00B sits in the Contemporary Moon Phase Open Heart family: a 41 mm SUS316L steel sports-dress watch with a mother-of-pearl dial, open-heart aperture, power-reserve display and a true mechanical moonphase — not the sun-and-moon day/night indicator found on many mainline Orient Classics.
Inside is Orient Star’s in-house calibre F7M63: automatic winding, hand-winding, roughly 50 hours of power reserve, and tighter regulation (+15 / −5 seconds per day) than everyday Orient mainline movements. Sapphire crystal, 100 m water resistance and a matching steel bracelet with deployant clasp make it a wearable daily automatic if you want complications on the wrist rather than in a drawer.
Why collectors look at this reference
- True moonphase at 6 o’clock with a companion date hand — genuine lunar complication, not a dual-tone day/night disc
- Open heart aperture so you can watch the balance at work on the dial side
- Power-reserve indicator so you know when the F7M63 needs a wind or wear
- Mother-of-pearl dial with depth and colour shift under changing light
- F7M63 in-house automatic — ~50 h reserve, hand-wind, hacking seconds, elevated accuracy standard
- Sapphire crystal (anti-reflective treated on quality retail specs) and exhibition case back
- 100 m water resistance — stronger daily margin than classic dress Orient Stars at 30–50 m
Who it suits
Buyers stepping up from Bambino or Seiko 5 who want Orient’s higher Star finishing and a multi-complication dial without jumping into Swiss luxury pricing. The 41 × 13.1 mm case and ~21 mm bracelet wear as a full-size men’s watch — better on medium to larger wrists. If you specifically want a mechanical moonphase you can explain in one sentence, this is one of the clearest Orient Star answers.
Technical specifications
- Brand: Orient Star
- Collection: Contemporary — Mechanical Moon Phase Open Heart
- Reference: RE-AY0005A00B (RE-AY0005A)
- Movement: Calibre F7M63, automatic + hand-winding, hacking seconds
- Jewels: 22
- Power reserve: over / approx. 50 hours
- Accuracy (Orient Star standard for this calibre): +15 to −5 seconds per day
- Case: stainless steel SUS316L, 41 mm diameter
- Thickness: approx. 13.1 mm
- Lug / bracelet width: 21 mm
- Lug-to-lug: approx. 48.5 mm (store measurement)
- Crystal: sapphire (anti-reflective coating per retailer specs)
- Case back: transparent sapphire / exhibition style
- Dial: white / mother-of-pearl with open heart
- Functions: hours, minutes, seconds, true moonphase, date, power reserve, open heart
- Bracelet: stainless steel, trifold deployant clasp with push buttons
- Water resistance: 100 m (10 bar)
- Origin: Japan
Frequently asked questions
Is the RE-AY0005A00B moonphase a real moonphase or sun and moon?
It is a true moonphase complication. Orient’s cheaper Sun & Moon models use a day/night disc; this Orient Star shows the lunar phase with a dedicated moonphase display plus a date hand.
What movement is inside the Orient Star RE-AY0005A00B?
In-house calibre F7M63. It winds automatically from the rotor, can be hand-wound, offers about 50 hours of reserve, and is regulated to a tighter daily rate than standard mainline Orient automatics.
What is the water resistance?
100 metres. Suitable for swimming and surface water sports when the crown is secured. Not a dive instrument — treat crowns and seals with normal care.
How large is the case on the wrist?
41 mm across and about 13.1 mm thick, with a steel bracelet at 21 mm. It wears as a contemporary full-size watch; try sizing expectations against other 41 mm sports-dress pieces rather than slim 38 mm Bambinos.
Does it have an open heart and power reserve?
Yes. The dial includes an open-heart window onto the movement and a power-reserve indicator, alongside the moonphase and date.
Where can I buy the Orient Star RE-AY0005A00B in Australia?
This Chronospride product page lists RE-AY0005A00B for Australian buyers. Authentic stock, inspected before dispatch, with free shipping on eligible orders.
Authentic stock, inspected before dispatch. Free shipping Australia-wide on eligible orders. Covered by Chronospride’s 12 months warranty, handled by our team. See our authenticity and warranty page.
| Brand | Orient |
|---|---|
| Case-Size | 41mm |
| Band-Width | 21mm |
| Lug-Width | 21mm |
| Lug to lug size | 48.5mm |
| Case Thickness | 13.1mm |
| UPC | 4942715027780 |
| GTIN | 4942715027780 |
| EAN | 4942715027780 |
