Seiko Cal. 4421 - 697

This Spring Drive model from 1979 features a 37mm Hardlex-Coated Steel case. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-96ac4ea9a0ee]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Navy

Jewels

29j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1979

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