Seiko Cal. 3821 - 909

This Spring Drive model from 1975 features a 34mm Hardlex-Coated Steel case. It features a Silver dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-95d84e657975]

Also known as: Monster, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Silver

Jewels

17j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1975

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