Seiko Cal. 5641 - 810

This Spring Drive model from 1977 features a 41mm Hardlex-Coated Steel case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-a74b4b0d594a]

Also known as: Rally

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1977

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