Seiko — Sumo

Prospex Sea King Sumo Blue Dial Automatic Diver's SPB321 SPB321J1 SPB321J 200M

This Prospex Sea King Sumo carries a blue dial in a 45 mm steel case rated to 200 m and rides on a stainless steel bracelet. Among the family's automatics it is one of the longest-running, listed in production from 2013 through 2023, though its caliber is unspecified rather than the 6R-series…

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ReferenceSPB321J1
BrandSeiko
FamilySumo
Produced2013–2023
StatusDiscontinued