Orient Star RE-AV0140E “Umi Heart” Open Heart Men's Automatic Watch, 75th Anniversary Limited Edition (41 mm, AR-Coated Sapphire Crystal, 100 m, Cal. F6F44, Made in Japan)

Storytelling: The Legend of “Umi Heart” (The Heart of the Deep Sea)

Inspired by the serenity and unfathomable mystery of Japan’s abyssal waters, this model has been named “Umi Heart” (Umi - 海, Japanese for “sea”). Its dial, finished in a deep ocean green (Deep Green), evokes the ocean floor where sunlight penetrates faintly, creating flashes of light and shadows of mesmerizing beauty. At the 9 o’clock position, the Open Heart window reveals the mechanical beat of the F6F44 caliber: a timekeeping mechanism that beats uninterruptedly at 21,600 vibrations per hour, acting like a true living heart in the calm of the ocean abyss. This 75th-anniversary commemorative edition, limited to 1,600 pieces worldwide, encapsulates the perfect harmony between the untamed power of water and Japanese craftsmanship.

Technical Specifications

Feature Technical Detail
Reference RE-AV0140E (75th Anniversary “Umi Heart” Limited Edition)
Worldwide Production Run 1,600 individually numbered pieces with engraving on the case back
Country of Manufacture Japan (Made in Japan)
Movement In-house automatic mechanical movement with manual winding and hacking seconds
Caliber Orient Star F6F44 (24 jewels)
Power Reserve 50 hours (with fan-shaped analog indicator at 12 o’clock)
Case Dimensions 49.0 mm (lug-to-lug distance) × 41.0 mm (diameter without crown) × 12.0 mm (thickness)
Lug Width 21 mm
Case Material Solid stainless steel with alternating fine brushed and mirror-polished finishes
Crystal Flat sapphire crystal with interior anti-reflective coating (AR Coating)
Case Back Screw-down with transparent display window (Display Caseback) and unique serial number
Dial “Umi” finish (deep abyssal green with sunray effect), Open Heart aperture at 9 o’clock and seconds sub-dial at 6 o’clock
Bracelet High-engineering solid stainless steel with ergonomically curved links
Closure Type: Three-fold deployant clasp with safety pushers and engraved Orient Star logo
Water Resistance: 100 Meters / 10 Bar (suitable for swimming, showering, and light water sports)
Functions: Power reserve indicator hand (at 12 o’clock), independent small seconds sub-dial (at 6 o’clock)

Key Selling Points

• Exclusive “Umi Heart” Identity: The harmony between the deep-sea green dial and the skeletonized window gives the timepiece a unique narrative and aesthetic value, transforming it into a watch with a soul of its own that transcends standard technical specifications.
• Limited Collector’s Edition (1,600 Pieces): An individually numbered timepiece created to commemorate the brand’s 75th anniversary, guaranteeing exclusivity and strong value retention on the secondary market.
• In-House F6F44 Movement with 50-Hour Power Reserve: A state-of-the-art caliber with an extended power reserve, instantly visible via its indicator at 12 o’clock for total control over the mainspring’s energy.
• Orient Star Finish Quality: Assembled in Japan to fine watchmaking tolerances: faceted bezel, precision-brushed case and sapphire crystal with a high-transparency anti-reflective coating that eliminates any optical distortion.
• True Water Resistance (100 m / 10 ATM): Unlike the vast majority of open heart-style watches on the market, which are designed with minimal water resistance, the “Umi Heart” features true 100-meter water resistance for everyday use without extreme precautions.