Seiko Cal. 4421 - 234

This Spring Drive model from 1972 features a 38mm Titanium case. With its 21mm lug width and 15.7mm profile, it sits comfortably on most wrists. [seikata-wm-f35a9512f305]

Also known as: Monster, Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Burgundy

Jewels

29j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1972

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