Seiko Cal. 5657 - 643

This Spring Drive model from 1976 features a 43mm PVD Black case. Powered by the 5657 caliber with 33j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-36eec79236fd]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

9.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1976

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