Seiko Cal. 6642 - 630

The Seiko 6642-630 represents an important milestone in Seiko's 1981 lineup. Powered by the 6642 caliber with 20j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-13b8998a9711]

Also known as: Sportsmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

36mm

Case Thickness

14.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Black

Jewels

20j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1981

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