Seiko Cal. 5641 - 889

This Spring Drive model from 1977 features a 42mm Hardlex-Coated Steel case. It features a Green dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-1a0115aabd7b]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

8.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

36j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1977

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