Seiko Cal. 4443 - 664

This Hand-Winding model from 1979 features a 39mm Stainless Steel case. Powered by the 4443 caliber with 20j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-54086ba67301]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

20j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1979

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