Seiko Cal. 5643 - 766

The Seiko 5643-766 represents an important milestone in Seiko's 1989 lineup. Powered by the 5643 caliber with 27j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-35d5f0ae4659]

Also known as: Monster, Crown

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Cream

Jewels

27j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1989

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