Seiko Cal. 5641 - 865

The Seiko 5641-865 represents an important milestone in Seiko's 1983 lineup. Powered by the 5641 caliber with 25j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-8a7b900036d4]

Also known as: Helmet, Arnie

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

46mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1983

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