Seiko Cal. 3817 - 609

This Automatic model from 1978 features a 39mm Two-Tone case. Powered by the 3817 caliber with 17j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-6c2d4fe35b44]

Also known as: Sumo, Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

17j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1978

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