Seiko Cal. 5663 - 660

This Spring Drive model from 1978 features a 38mm Two-Tone case. Powered by the 5663 caliber with 31j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-634fc75a797e]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Champagne

Jewels

31j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1978

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