Seiko Cal. 6642 - 961

The Seiko 6642-961 represents an important milestone in Seiko's 1983 lineup. Powered by the 6642 caliber with 22j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-1ac6b3a19d2b]

Also known as: Monster, World Timer

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

39mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1983

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