Seiko Cal. 3817 - 609

Seiko 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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