Seiko Cal. 4431 - 934

This Spring Drive model from 1970 features a 40mm Two-Tone case. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-aa706961801d]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

15.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

29j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1970

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