Illustration. The seconds hand sweeps, like the real movement.
Prospex Diver's 1965 Modern Re-interpretation
Ref. SPB143
Also SPB143J1
Grey sunray dial, brushed steel bezel insert, steel bracelet
- Diameter
- 40.5 mm
- Thickness
- 13.2 mm
- Water
- 200 m
- Movement
- 6R35
€1,250
Launch RRP (2020) per Monochrome. Discontinued; succeeded by the 300 m SPB451/SPB453 in 2024.
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Why it's interesting
For many enthusiasts this is the best modern reading of Seiko's first diver: a restrained 40.5 mm case, a grey sunray dial and none of the usual Prospex bulk. Since superseded by 300 m, three-day successors, it remains the reference point they get measured against.
Watch DNA. Filled tags are editorial; outlined tags come from the specifications.
The numbers
Verified specificationsSize
- Diameter
- 40.5mm
- Lug to lug
- 47.6mm
- Thickness
- 13.2mm
- Lug width
- 20mm
Because you like this…
Chosen for shape, size, colour, character and price. Rarely the same brand twice.
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About this page
Verified specifications, checked September 2026
Dimensions, water resistance, movement and crystal were checked against the sources below.
Seiko's product page is offline; specs from Monochrome's review. Successor models from Seiko's 2024 press release.
The illustration is a bezelga rendering generated from the specifications. It is not a photograph and may simplify details such as logos, text and finishing.
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