Seiko Cal. 4431 - 103

The Seiko 4431-103 represents an important milestone in Seiko's 1985 lineup. With its 18mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-b1fb76adf2b3]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

44mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1985

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