Seiko Cal. 6644 - 259

This Spring Drive model from 1982 features a 39mm Titanium case. Powered by the 6644 caliber with 22j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-859291c72117]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

14.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1982

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