Orient Sun and Moon Open Heart (Ref. RA-AS0005S / RA-AS0011S / RN-AS0001B)
Dress Watch / Complications Watch (Sun & Moon phase indicator and Open Heart) · Orient Watch (Epson / Seiko Epson Group). Tier: Affordable Luxury / High-Quality Entry-level. Known for being one of the few brands at this price point to manufacture in-house movements.
Period: Modern Classic (2010s-Present). It blends traditional horological elements like an open heart and celestial indicator with a modern, oversized case aesthetic.
Type
Dress Watch / Complications Watch (Sun & Moon phase indicator and Open Heart)
Brand
Orient Watch (Epson / Seiko Epson Group). Tier: Affordable Luxury / High-Quality Entry-level. Known for being one of the few brands at this price point to manufacture in-house movements.
Movement
Automatic, Orient In-House Caliber F6L24. Features 22 jewels, 21,600 bph frequency, hacking (stop seconds), hand-winding, and approximately 40 hours of power reserve.
Dimensions
Case Diameter: 42mm; Thickness: 14mm; Lug-to-Lug: 49.5mm; Lug Width: 22mm. It wears larger and thicker than a traditional dress watch due to the domed crystal and layered movement.
Description
The Orient Sun and Moon Open Heart is a standout piece that combines visual complexity with mechanical reliability. It manages to cram several 'high-end' visual cues—a celestial complication and a view of the balance wheel—into a robust, stainless steel package. It is widely considered one of the best value 'introductory complication' watches for a burgeoning collector.
Key Features
Signature 'Sun and Moon' disk that rotates once every 24 hours to show day/night cycles; the heart-beat window at 9; and the in-house F6L24 movement which provides hacking and hand-winding.
Dial Description
Black matte or subtly textured dial featuring a prominent 'Open Heart' aperture at 9 o'clock. Includes a 'Sun and Moon' day/night sub-dial at 6 o'clock. Indices are a mix of applied Arabic numerals (12, 2, 4, 6, 8, 10) and batons. Leaf-style hands.
Case Material
316L Stainless Steel with a mix of high-polished and brushed finishes.
Crystal Type
Scratch-resistant Sapphire crystal (Flat or slightly domed). Generally clear with high durability.
Bezel Details
Fixed, stationary smooth bezel made of polished stainless steel, integrated into the case design.
Crown & Pushers
Push-pull crown (not screw-down) located at 3 o'clock, signed with the Orient double-lion logo. No additional pushers.
Bracelet or Strap
Stainless steel 3-link Oyster-style bracelet with brushed outer links and polished center accents. Deployment clasp with dual push-button release.
Caseback Details
Exhibition/Display caseback with a mineral crystal window, allowing views of the F6L24 movement and the decorated Orient rotor. Screw-down caseback perimeter.
Movement Type
Automatic, Orient In-House Caliber F6L24. Features 22 jewels, 21,600 bph frequency, hacking (stop seconds), hand-winding, and approximately 40 hours of power reserve.
Water Resistance
50 Meters (5 ATM). Suitable for light splashes and hand washing; not recommended for swimming, snorkeling, or diving.
Origin & Provenance
Japanese-made. Manufactured in-house by Orient in Japan, utilizing Japanese mechanical engineering.
Age Estimate
Circa 2018-present. This specific 'Open Heart' iteration of the Sun and Moon series is a relatively recent addition to the product line.
Cultural Significance
Represents the 'Everyman's Luxury' segment of the Japanese watch industry. It has gained a cult following in the horological community for providing 'Haut Horlogerie' aesthetics at an accessible price point.
Condition Notes
Based on user description 'No visible sights of use,' the watch is in Mint or Like-New-In-Box (LNIB) condition. Case, crystal, and bracelet appear pristine without micro-abrasions.
Value Estimate
Retail: $350-$450 USD. Secondary Market: $200-$300 USD depending on region and existence of original packaging.
Care & Maintenance
Service every 3-5 years. Avoid magnetism from speakers or laptops. Clean the bracelet with a soft cloth and soapy water. Do not submerge deeply as it lacks a screw-down crown.
Similar Watches
Seiko Presage 'Cocktail Time' (thinner, no Sun/Moon), Tissot Le Locle (Swiss equivalent, higher price), or the standard Orient Sun and Moon Version 3 (enclosed dial, has date/day complications).
Interesting Facts
Orient is unique because it makes its own mechanical movements, whereas most brands in this price range outsource to Seiko (SII) or Citizen (Miyota). The 'Sun and Moon' is technically a day/night indicator, not a true moon phase, though it is often mistaken for one.
Notes
No visible sights of use