Seiko Cal. 5633 - 171

This Spring Drive model from 1966 features a 44mm PVD Black case. Powered by the 5633 caliber with 28j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-8ff2a7675211]

Also known as: UFO, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Burgundy

Jewels

28j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1966

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