The Seiko Prospex SPB453 is a modern reissue of the 1965 62MAS, Japan's first diver's watch. It pairs a 40mm stainless steel case and bracelet with a black dial, LumiBrite markers and hands, a unidirectional timing bezel, a date at 4:30 and a curved sapphire crystal with anti-reflective coating. It is an automatic dive watch aimed at people who want vintage dive styling with current specs, and it sits above entry Seiko divers like the SRPE and Turtle in finishing and crystal, while costing far less than Swiss heritage divers with comparable water resistance. Owners rate it highly for its size, legibility and build.
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Owners rate the SPB453 very highly, praising its 40mm size, dial legibility and the vintage 62MAS look done with modern materials. Most criticism centers on timekeeping accuracy and the bracelet rather than the watch itself.
The Seiko Prospex SPB453 is an automatic diver's watch based on Seiko's first diving watch, the 1965 62MAS. It has a 40mm stainless steel case, a black dial and a stainless steel bracelet. It pairs vintage styling with updated materials and 300 meters of water resistance.
The black dial has rectangular hour markers and broad hands coated with LumiBrite for low-light visibility. The date window sits between 4 and 5 o'clock, so all 12 hour markers can be luminous. A unidirectional rotating bezel times elapsed time. A curved sapphire crystal with an anti-reflective coating covers the dial.
Seiko's in-house Caliber 6R55 automatic movement powers the watch, with about 72 hours of power reserve. It has 24 jewels, manual winding and a stop-seconds function for precise time setting. The case is 13mm thick with a 46.4mm lug-to-lug length. The bracelet has a three-fold clasp with an extender.
