Seiko Cal. 6640 - 917

This Spring Drive model from 1982 features a 41mm Two-Tone case. It features a Cream dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-0dafa3f07316]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Cream

Jewels

28j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1982

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