Seiko Cal. 4437 - 620

This Hand-Winding model from 1979 features a 40mm Stainless Steel case. With its 20mm lug width and 14.5mm profile, it sits comfortably on most wrists. [seikata-wm-603dded36fb1]

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

White

Jewels

25j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1979

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