Seiko Cal. 5641 - 836

The Seiko 5641-836 represents an important milestone in Seiko's 1977 lineup. It features a White dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-b95a306ca63e]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

39mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

90m

Dial Color

White

Jewels

20j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1977

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