Seiko Cal. 5641 - 931

The Seiko 5641-931 represents an important milestone in Seiko's 1969 lineup. With its 20mm lug width and 11.5mm profile, it sits comfortably on most wrists. [seikata-wm-447e80833818]

Also known as: Tuna, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Cream

Jewels

20j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1969

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