The Orient Star M45 F7 Mechanical Moon Phase RE-AY0102S is an exceptionally elegant, high-performance mechanical dress watch engineered for men who appreciate the heritage of traditional Japanese watchmaking blended with high-end astronomical complications. Belonging to the premium M45 F7 flagship series, this model serves as a brilliant daily companion that bridges the gap between structured office wear and upscale evening events, providing an elevated executive profile on the wrist. The defining visual masterpiece of the RE-AY0102S is its high-contrast, multi-layered white dial face. Centered on the iconic "OS" mark, the outer dial is subtly decorated with an interlocking diamond pattern inspired by traditional Japanese design motifs. The layout balances classic styling cues with dynamic mechanical features, showcasing striking blue hands, bold Roman numeral hour indices, an asymmetrical "Open Heart" window at 9 o'clock that reveals the ticking escapement wheel, a Power Reserve gauge at 12 o'clock, and a dual-purpose sub-dial at 6 o'clock housing an in-house astronomical Moon Phase disc along with an integrated pointer date scale. Beneath its artistic dress exterior, this timepiece is powered by the high-grade, in-house Orient Caliber F7M62 automatic movement. A luxury Japanese mechanical engine celebrated by watch enthusiasts for its absolute reliability, it features 22 jewels and operates at a smooth frequency of 21,600 vibrations per hour. It also supports manual hand-winding, a second-hand hacking mechanism for precise synchronization, and delivers a dependable 50-hour power reserve. The watch case is sculpted from premium, corrosion-resistant SUS316L marine-grade stainless steel, showcasing fine brushed surfaces accented by high-end Sallaz hand-polished mirror finishes. The face is shielded by a dual-curved sapphire crystal treated with a high-end Super Anti-Reflective (SAR) coating on both sides, minimizing light glare to deliver absolute, crystalline legibility. Engineered with everyday versatility in mind, the case features a see-through sapphire exhibition caseback and achieves a solid 50-meter (5 bar) water resistance rating. It comes completed on a heavy-duty, multi-link stainless steel bracelet that fastens seamlessly with a butterfly deployant clasp and push-button release.
