Sinn 534 Mother-of-Pearl WvsYema Flygraf Bi-Compax French Air Force

Owners widely praise the Sinn 534 Mother-of-Pearl W for its excellent timekeeping, consistently reporting accuracy around -1s/day, and the high quality of its bracelet, which features an impressive butterfly clasp. The double-AR coated crystal is noted for its near-invisibility, enhancing the dial's appearance. However, some find the 34mm case size and 18mm lug width too small for wrists 7.5 inches or larger, while others appreciate its vintage-like proportions. The mother-of-pearl dial is described as subtle, appearing gray most of the time with only occasional flashes of color, which some feel contributes to its tool-watch aesthetic. The crown is noted as potentially bothersome if the watch is worn loosely. On balance, owners rate the Sinn 534 Mother-of-Pearl W highly for its subtle dial execution and robust build quality, particularly appreciating its precise timekeeping and refined bracelet.

Owners widely praise the Yema Flygraf Bi-Compax French Air Force for its attractive, toolish aesthetic and excellent quality for the price, noting the legible Type A dial and 40mm titanium case. However, the acrylic crystal scratches easily, and the titanium case is prone to marking. The mecha-quartz movement's chrono timer sweeps rather than ticks, and one owner questions the purpose of the oversized crown. The in-house Yema 2000 movement is accurate at +/- 10 seconds per day but has a 42-hour power reserve, and some owners express concerns regarding Yema's past quality control and customer service. On balance, owners rate the Yema Flygraf Bi-Compax French Air Force highly for its attractive design and value, despite concerns about material durability and brand service history.