Seiko Cal. 6644 - 635

This Quartz model from 1969 features a 39mm Titanium case. Powered by the 6644 caliber with 22j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-9d964c362474]

Also known as: Samurai, UFO

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

White

Jewels

22j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1969

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