Seiko — Sumo

Prospex

Seiko Prospex SPB103, a 45 mm round automatic diver in stainless steel rated to 200 m, carrying a green dial. Produced 2019–2023, it lists an unspecified caliber rather than a named 6R movement, but sits among the green-dial entries of the family.

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Seiko Prospex SPB103
ReferenceSPB103
BrandSeiko
FamilySumo
Produced2019–2023
StatusDiscontinued