Seiko Cal. 4431 - 167

This Hand-Winding model from 1970 features a 38mm Titanium case. The Coin-Edge bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-1e745038f6ba]

Also known as: Helmet, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Navy

Jewels

18j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1970

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