Seiko Cal. 5670 - 521

This Spring Drive model from 1988 features a 40mm Stainless Steel case. Powered by the 5670 caliber with 31j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-e318cbb09e77]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

15.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

90m

Dial Color

White

Jewels

31j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1988

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