Seiko Cal. 5644 - 388

This Hand-Winding model from 1965 features a 46mm Stainless Steel case. The Fixed bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-6fb64af8c394]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1965

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