Seiko Cal. 4431 - 643

The Seiko 4431-643 represents an important milestone in Seiko's 1969 lineup. The Inner Rotating bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-e47fe7cae413]

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

8.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Burgundy

Jewels

35j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1969

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