Seiko Cal. 5691 - 201

This Automatic model from 1978 features a 39mm Stainless Steel case. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 130m of water resistance. [seikata-wm-2ceb9b602d64]

Also known as: Bullhead, Helmet

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

11.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1978

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