Seiko — Sumo

Prospex

In production since 2023, the SPB375J1 is a 45 mm round stainless steel diver rated to 200 m, set apart by a blue sunray dial that catches the light. It returns to the family's mechanical heart with the 6R35 automatic, offering manual winding and a 70-hour power reserve.

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Seiko Prospex SPB375J1
ReferenceSPB375J1
BrandSeiko
FamilySumo
Produced2023–present
StatusIn production