Seiko Cal. 6644 - 766

This Quartz model from 1983 features a 36mm Stainless Steel case. Powered by the 6644 caliber with 20j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-6c0fb71591be]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Green

Jewels

20j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1983

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