Seiko — Tuna

Prospex

Produced from 2015 to 2019, this Prospex Tuna marks the family's shift to mechanical power, running an unspecified automatic caliber. The 47.5 mm round case pairs a stainless-steel body with the signature stainless-steel protective shroud and carries a black dial. Water resistance is rated to 200…

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Seiko Prospex SRP637
ReferenceSRP637
BrandSeiko
FamilyTuna
Produced2015–2019
StatusDiscontinued