Seiko Cal. 3831 - 101

This Hand-Winding model from 1999 features a 46mm Stainless Steel case. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-9a3a1bb84178]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1999

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