Seiko Cal. 3817 - 612

The Seiko 3817-612 represents an important milestone in Seiko's 1977 lineup. Powered by the 3817 caliber with 30j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-799ab9d63643]

Also known as: Baby Tuna, Emperor

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Champagne

Jewels

30j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1977

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