Seiko Cal. 5641 - 254

The Seiko 5641-254 represents an important milestone in Seiko's 1968 lineup. The Inner Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-b3bb658fb921]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

9.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Green

Jewels

19j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1968

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