Orient Contemporary “Stretto” Semi-Skeleton RA-AR0002B | Mechanical Automatic Watch with In-House Caliber F6S22, Sapphire Crystal, Open-Heart Dial, and Skeletonized Case Back (40.8 mm, 50 m)

Professional Description

The Orient Stretto RA-AR0002B (part of the renowned Contemporary Semi-Skeleton line) is a showcase of traditional Japanese watchmaking craftsmanship made accessible. Designed with a contemporary approach that balances executive sophistication and technical dynamism, this model reveals the heart of its micromechanics through an open heart window at 9 o’clock, allowing a direct view of the regulator balance wheel’s uninterrupted oscillation.

At its heart beats the Orient F6S22 in-house caliber, an automatic movement developed and assembled entirely in Japan that features an auxiliary manual winding mechanism and a hacking function for precise timing. Its 40.8 mm stainless steel case, with its balanced proportions, is protected by a scratch-resistant sapphire crystal and complemented by a deep black dial featuring an eccentric subdial for the small seconds at 6 o’clock. Equipped with a sturdy surgical-grade SUS316L stainless steel bracelet and a transparent case back, it offers a refined look ideal for both everyday and formal wear.

Key Features

• F6S22 Manufacture Caliber (Made in Japan): An in-house automatic mechanical movement, featuring 22 jewels, over 40 hours of power reserve, manual winding, and a seconds-stop system for precise time setting.
• Semi-Skeleton Complication and Small Seconds: An open-heart window at 9 o’clock to observe the escapement in action, harmoniously complemented by a sub-dial at 6 o’clock dedicated to the continuous seconds hand.
• Front Sapphire Crystal: Crystal of maximum hardness and crystalline transparency, virtually immune to scratches caused by everyday use.
• See-Through Screw-Down Case Back: Screw-down case back with a crystal display window (see-through caseback) that allows you to admire the decorated oscillating weight and the gears of the mechanical caliber.
• Solid SUS316L Stainless Steel Bracelet: High-quality stainless steel bracelet with satin-finished links and polished edges, featuring a triple folding clasp with side-mounted quick-release pushers.
• Night Visibility: Faceted hands and applied hour markers with high-brightness phosphorescent treatment for instant readability in low-light environments.

Technical Specifications

Component / Feature Technical Detail
Brand and Collection Orient (Contemporary Series / Stretto Semi-Skeleton)
Reference / Model RA-AR0002B
Movement Type In-House Automatic Mechanical (Orient Caliber F6S22)
Caliber Origin Manufactured in Japan (Japan Movt)
Number of Jewels 22 jewels
Power Reserve Over 40 hours
Mechanical Functions Automatic winding via rotor, manual winding, and hacking seconds
Case Material Stainless steel (SUS304) with polished and brushed finishes
Case Dimensions Diameter: 40.8 mm | Length (Lug to Lug): 48.0 mm
Front Crystal Flat sapphire crystal with high abrasion resistance
Case Back Screw-down, with a transparent mineral crystal window
Dial Black with a subtle striped texture, Open Heart window, and auxiliary sub-dial
Bracelet Stainless steel (SUS316L), 21.9 mm wide
Closure: Triple-fold deployant clasp with dual safety pushers
Water Resistance: 50 meters (5 ATM / 5 Bar)

Dial Details and Functionality

• Multilayer Architectural Dial: Clean-lined black dial with mirror-polished faceted hour markers that capture light from any angle, creating flawless visual contrast.
• Asymmetrical Small Second Hand: The separation of the small second hand from the central hands optimizes time-reading and lends a distinctive touch characteristic of classic chronometers.
• Flexible Hybrid Winding: The mainspring can be wound through the natural movement of the wrist or by manually operating the fluted crown after periods of inactivity.