Seiko Cal. 7156 - 644

The Seiko 7156-644 represents an important milestone in Seiko's 1980 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-17383034fb06]

Also known as: Helmet, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

14.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1980

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