Seiko Cal. 4427 - 401

This Spring Drive model from 1970 features a 43mm Hardlex-Coated Steel case. With its 22mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-fc65c2fde681]

Also known as: Monster, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

10.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

33j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1970

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