
The Sugess MoonPhase Master S437 (ref. S437) is an automatic moon phase chronograph watch, with a 40mm stainless steel/rose gold case, 13.5mm thick, powered by the ST2528 movement and a 48-hour power reserve. Water resistance is rated to 50m, under a sapphire crystal, with moonphase, date complications. Manufacturer MSRP is $549.
Owners widely praise the Sugess MoonPhase Master S437 for its striking dial, often described as deep blue or aventurine, and its value, with prices around $171-$175. The Seagull ST1908 movement is noted as accurate, with one owner reporting +3 seconds over 18 hours and another +7 seconds daily, and its hand-winding action is smooth. However, the watch's thickness, potentially over 13mm, is a concern for some as a dress watch, and the long lugs may pose a fit issue on smaller wrists. A potential design flaw in the moonphase window, showing two phases simultaneously, is flagged as a deal-breaker by some. The included leather straps are considered stiff and uncomfortable, and the domed sapphire crystal lacks AR coating, leading to reflections. On balance, owners rate the Sugess MoonPhase Master S437 highly for its stunning dial and value, despite some fit and finishing concerns.