Seiko Cal. 3831 - 366

This Hand-Winding model from 1975 features a 41mm Titanium case. It features a Black dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-7bd3d46bc2a6]

Also known as: Crown

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

13.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Black

Jewels

33j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1975

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