Orient Star Avant-Garde Skeleton Ref. RE-AV0A03B (also RK-AV0A03B in JDM)
Skeleton Sports Watch · Orient Star (owned by Seiko Epson Corporation). It is the premium luxury tier of Orient, positioned as an entry-to-mid luxury manufacture.
Period: Modern Luxury / Contemporary Industrial. Characterized by a complex multi-layered dial architecture and open-heart movement typical of the 2020s design language.

Type
Skeleton Sports Watch
Brand
Orient Star (owned by Seiko Epson Corporation). It is the premium luxury tier of Orient, positioned as an entry-to-mid luxury manufacture.
Movement
Automatic/Self-winding Caliber F6F44, Made in Japan, 21,600 bph frequency, 50-hour power reserve, 24 jewels, featuring hacking and hand-winding.
Dimensions
Case diameter: 43.2mm, thickness: 13.7mm, lug-to-lug: 49.2mm, lug width: 21mm. It wears boldly due to the wide bezel but fits well on average wrists thanks to curved lugs.
Description
The Orient Star Avant-Garde Skeleton is a striking exercise in modern mechanical aesthetics. Unlike traditional dress skeletons, it adopts a 'tough' industrial look with a dual-layer dial that creates immense depth. The contrast between the charcoal plates and the rose-gold accents provides a luxury feel, while the exposed mechanics at 9 o'clock emphasize its horological pedigree. It represents Orient Star’s push into higher-end, bold tool-watch designs.
Key Features
Power reserve indicator at 12 o'clock, multi-layer semi-skeleton construction, Zaratsu-style Sallaz polishing, and the signature 'S' logo on the dial and crown.
Dial Description
Black and charcoal multi-layered skeletonized dial. Features an 'open heart' at 9 o'clock showing the escapement, a power reserve indicator at 12, and a small seconds subdial at 6. Applied luminous indices and rose gold-tone 'XII' and hands.
Case Material
Stainless steel (316L) with a combination of brushed surfaces and Sallaz (Zaratsu-style) polished accents. Some variants feature black PVD/DLC coatings.
Crystal Type
Flat sapphire crystal with anti-reflective (SAR) coating on both sides for superior clarity against the complex dial.
Bezel Details
Fixed gear-edged bezel in black ion-plated stainless steel, featuring modern aesthetic cutouts and a smooth finish.
Crown & Pushers
Large screw-down crown with the Orient Star 'S' logo. No guards, emphasizing the industrial 'Avant-Garde' look.
Bracelet or Strap
Stainless steel three-link bracelet with a brushed finish and polished edges. Features a push-button deployment clasp with a safety fold-over latch.
Caseback Details
Exhibition screw-down caseback with sapphire glass revealing the Orient Star decorated rotor and movement plates. Engraved with 'Water Resistant 10 Bar' and 'Made in Japan'.
Movement Type
Automatic/Self-winding Caliber F6F44, Made in Japan, 21,600 bph frequency, 50-hour power reserve, 24 jewels, featuring hacking and hand-winding.
Water Resistance
100 meters (10 bar). Suitable for swimming and snorkeling, but not recommended for high-impact water sports or scuba diving.
Origin & Provenance
Japan. Features a fully in-house manufactured movement from the Epson Shiojiri factory.
Age Estimate
Circa 2020–present. This specific model is part of the contemporary Avant-Garde collection launched in late 2020.
Cultural Significance
Orient Star is highly respected by enthusiasts as the 'best value' in Japanese luxury. The Avant-Garde series marked a shift for the brand from conservative dress watches to aggressive, modern sports-watch design.
Condition Notes
Based on the photograph, the watch appears to be in Excellent to Mint condition, possibly New Old Stock (NOS) as the original hangtag and box are visible in the background.
Value Estimate
Retail (MSRP) approx. $1,200–$1,500 USD. Secondary market prices typically range from $650 to $950 USD depending on condition and presence of box/papers.
Care & Maintenance
Service every 3–5 years. Ensure the screw-down crown is fully tightened before water exposure. Clean the bracelet with a soft brush and water to prevent 'wrist cheese' buildup in the links.
Similar Watches
Seiko Sharp Edged Series (non-skeleton), Hamilton Ventura Skeleton, Oris Big Crown Propilot X. Compared to Hamilton, the Orient Star offers an in-house movement and power reserve complication.
Interesting Facts
Orient Star's Sallaz polishing is the same technique (and often uses the same machines) as the famous 'Zaratsu' polishing seen on Grand Seiko watches, offering incredible distortion-free reflections at a lower price point.