Seiko Prospex 1965 “62MAS” Watch SPB053J1

The Seiko Prospex 1965 “62MAS” 42.6mm (Ref. SPB053J1/SBDC053) recreates the spirit of the legendary 1965 reference 6217, Japan’s first-ever dive watch, through Made-in-Japan automatic construction that brings historic design firmly into the modern era whilst meeting full ISO 6425 dive standard. The deep blue dial with sunburst sheen shifts from near-black in low light to vivid royal blue in daylight whilst the broad arrow hour hand and long sword minute hand with bold applied indices generously filled with proprietary LumiBrite ensure exceptional visibility.

At 42.6mm with stainless steel construction featuring Seiko’s super-hard coating, this provides substantial diving presence whilst the premium curved sapphire crystal with anti-reflective inner coating represents notable upgrade over earlier Hardlex alternatives. The 120-click unidirectional bezel tracks elapsed dive time whilst the deep blue sunburst dial creates sophisticated visual depth that honours the original 62MAS aesthetic.

The celebrated in-house Calibre 6R15 delivers reliable 50-hour power reserve through 23-jewel construction with manual winding and hacking seconds ensuring exceptional versatility. The proven automatic movement provides weekend-proof operation whilst the repairable construction ensures longevity that can be passed down through generations.

The curved sapphire crystal and screw-down crown ensure 200m water resistance whilst the full ISO 6425 dive certification validates genuine professional dive instrument capability. The LumiBrite luminous compound provides exceptional initial brightness essential for night diving and low-light conditions.

This Prospex 1965 “62MAS” suits collectors seeking authentic Japanese diving heritage with proven in-house movement and professional dive certification. The historic 62MAS recreation and Made-in-Japan construction create distinguished character whilst the exceptional power reserve and ISO 6425 certification ensure genuine diving capability that honours Seiko’s pioneering contribution to Japanese dive watch development with quiet authority earned through six decades of horological excellence.