Seiko Cal. 3831 - 901

The Seiko 3831-901 represents an important milestone in Seiko's 1981 lineup. It features a Silver dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-0c0bfdf397b4]

Also known as: Monster, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Silver

Jewels

32j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1981

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