Seiko Cal. 5637 - 691

The Seiko 5637-691 represents an important milestone in Seiko's 1978 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-1f5d5801b47b]

Also known as: Pogue

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

110m

Dial Color

Burgundy

Jewels

22j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1978

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