Seiko Cal. 3821 - 356

The Seiko 3821-356 represents an important milestone in Seiko's 1968 lineup. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-43359cdd14ee]

Also known as: Helmet, Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

15.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1968

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