Seiko Cal. 5641 - 830

The Seiko 5641-830 represents an important milestone in Seiko's 1966 lineup. Powered by the 5641 caliber with 34j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-24dc1921bbaf]

Also known as: Turtle, Sportsmatic

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

110m

Dial Color

Black

Jewels

34j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1966

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