Orient Sun and Moon Open Heart Automatic Ref. RA-AS0002B
Dress Watch with Complication · Orient (Epson Group). Orient is a renowned Japanese manufacturer famous for producing high-quality mechanical movements in-house at an accessible luxury price point.
Period: Modern Luxury (2010s-present) featuring neo-classical design elements such as the sun/moon disc and open-heart aperture.
Type
Dress Watch with Complication
Brand
Orient (Epson Group). Orient is a renowned Japanese manufacturer famous for producing high-quality mechanical movements in-house at an accessible luxury price point.
Movement
Automatic, In-house Caliber F6L24; 21,600 vph, 22 jewels, approximately 40-hour power reserve with hacking and hand-winding capabilities.
Dimensions
Diameter: 42mm; Thickness: 14mm; Lug-to-lug: 50mm; Lug width: 22mm. It wears larger than a traditional dress watch due to thickness.
Description
The Orient Sun and Moon Open Heart is a sophisticated mechanical timepiece that blends classical aesthetics with Japanese engineering. It is a visual powerhouse, offering both an 'open heart' window to observe the heartbeat of the movement and a romantic AM/PM sun and moon disc. The 42mm case gives it a commanding presence, bridging the gap between a formal dress watch and a daily executive tool.
Key Features
Signature 'Sun and Moon' AM/PM complication, open-heart escapement window, in-house Japanese automatic movement, and a domed sapphire crystal.
Dial Description
Matte black dial with a sunburst finish; features an 'Open Heart' aperture at 9 o'clock showing the balance wheel. Sub-dial at 6 o'clock displays the 'Sun and Moon' (AM/PM) indicator. Applied silver-tone Arabic numerals and baton indices with leaf-shaped hands.
Case Material
316L Stainless Steel with a combination of high-polished lugs and bezel, and brushed case sides.
Crystal Type
Domed Sapphire Crystal on the front for scratch resistance; mineral glass exhibition caseback.
Bezel Details
Fixed, stationary smooth bezel in polished stainless steel.
Crown & Pushers
Standard push-pull crown at 3 o'clock with the Orient logo; unsigned and non-locking. No pushers.
Bracelet or Strap
Stainless steel three-link Oyster-style bracelet with brushed outer links and polished center accents; fold-over clasp with double push-button release.
Caseback Details
Screw-down exhibition caseback with a view of the Caliber F6L24 movement; circular brushing on the steel perimeter with engravings including 'Water Resistant' and 'Sapphire'.
Movement Type
Automatic, In-house Caliber F6L24; 21,600 vph, 22 jewels, approximately 40-hour power reserve with hacking and hand-winding capabilities.
Water Resistance
50 Meters (5 ATM). Suitable for light splashes and rain; not recommended for swimming or diving.
Origin & Provenance
Japanese origin; manufactured and assembled by Orient Watch Co., Ltd. Movement is 100% in-house.
Age Estimate
Modern production, likely manufactured between 2018 and the present day.
Cultural Significance
Representing the high value-for-money proposition of Japanese horology, this model is a favorite among entry-level collectors for its 'complication-heavy' appearance that mimics much more expensive European timepieces.
Condition Notes
Very Good/Excellent. The case and bracelet show light surface hairlines typical of gentle wear. The sapphire crystal appears clear and free of scratches.
Value Estimate
Retail (MSRP) approximately $350–$450 USD; Secondary market value typically ranges from $180 to $280 USD depending on condition.
Care & Maintenance
Service every 3-5 years; avoid strong magnetic fields; verify water seals if submerged; clean bracelet with a soft brush and water.
Similar Watches
Orient Bambino Open Heart (smaller/simpler), Seiko Presage 'Cocktail Time' (more minimalist), Tissot Tradition Open Heart (Swiss alternative with ETA movement).
Interesting Facts
Orient is one of the few brands in its price tier that designs and manufactures its own movements entirely in-house, a feat usually reserved for high-end Swiss brands like Rolex or Patek Philippe.