Seiko Cal. 3821 - 921

The Seiko 3821-921 represents an important milestone in Seiko's 1968 lineup. It features a Silver dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-456b35531a09]

Also known as: Sumo, Rally

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

12.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

140m

Dial Color

Silver

Jewels

23j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1968

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