Seiko Cal. 4431 - 101

The Seiko 4431-101 represents an important milestone in Seiko's 1980 lineup. With its 19mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-ad053955aa3d]

Also known as: Bellmatic, World Timer

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

11.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1980

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