Seiko Cal. 3817 - 138

The Seiko 3817-138 represents an important milestone in Seiko's 1978 lineup. Powered by the 3817 caliber with 21j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-6c7801289a20]

Also known as: Sea Horse

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

10.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

21j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1978

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