My wrist measures less than 16cm in circumference, and while I have always favored professional dive watches, the standard 43.5mm Seamaster 600 felt too heavy and bulky on my wrist—making it difficult to fit under a shirt cuff. The 39.5mm version perfectly addresses the pain points for those with smaller wrists, which is the primary reason I ultimately chose it. After comparing it with the Seamaster 300 and the 38mm Fifty Fathoms, the Seamaster 600 stands out as a professional saturation diving tool watch; its hardcore specifications—including 600-meter water resistance, a side-mounted helium escape valve, and a ceramic/Liquidmetal bezel—are irreplaceable. It transitions seamlessly between daily wear and underwater use, with the rubber strap version being an ideal choice for summer.More website.
I opted for the OEM black rubber strap; it features a fine, non-slip texture on the outside and a breathable wave pattern on the inside, preventing sweat buildup. The folding clasp includes a micro-adjustment extension, ensuring a perfect fit whether swimming or wearing thick sleeves. It is significantly lighter than the steel bracelet and pairs effortlessly with both sporty and casual outfits. The unidirectional ceramic bezel is highly scratch-resistant, and the Liquidmetal diving scale won't fade over time. The dial features three-dimensional Arabic numerals fully coated with Super-LumiNova for clear legibility underwater and at night. The date window at 3 o'clock adjusts smoothly, and the screw-in crown ensures a secure seal, meaning I never have to take the watch off for daily tasks like hand-washing or swimming.
It is powered by the Omega 8800 Co-Axial Master Chronometer movement, featuring a silicon balance spring and a free-sprung balance for exceptional magnetic resistance. It has passed eight rigorous METAS tests, delivering stable daily accuracy of 0 to +5 seconds and a 60-hour power reserve—meaning it won't stop running even if left unworn over the weekend. The NAIAD LOCK case back features a sapphire crystal display; the Seamaster emblem always stays upright, and the Geneva wave finishing looks superb—making the case back a delight to admire every time I flip the watch over.
After wearing it for an extended period, the pros and cons are clear: the 39.5mm diameter and moderate thickness make it comfortable for small wrists; the lightweight rubber strap offers far superior summer comfort compared to a steel bracelet; and the 600-meter professional water resistance provides total peace of mind without any compromises. A minor drawback is that the rubber strap may age slightly with prolonged exposure to sunlight, requiring simple routine maintenance; while the ceramic bezel is scratch-resistant, it still carries a risk of chipping if subjected to a hard impact.