Seiko Cal. 6613 - 761

This Spring Drive model from 1975 features a 40mm PVD Black case. It features a Navy dial protected by a Sapphire crystal and offers 200m of water resistance. [seikata-wm-b415519ecc03]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Navy

Jewels

34j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1975

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