Seiko Cal. 6331 - 958

This Hand-Winding model from 1981 features a 44mm Titanium case. With its 22mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-cd27e5f840f6]

Also known as: Sportsmatic, Crown

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

44mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1981

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