Seiko Cal. 5691 - 721

This Hand-Winding model from 1966 features a 34mm PVD Black case. It features a Silver dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-970ca7fbede9]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

13.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Silver

Jewels

25j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1966

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