Seiko Cal. 5640 - 476

This Spring Drive model from 1979 features a 44mm Hardlex-Coated Steel case. It features a Green dial protected by a Acrylic crystal and offers 130m of water resistance. [seikata-wm-190e722bbc7f]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1979

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