Seiko Cal. 3817 - 670

Seiko 3817-670

This Automatic model from 1975 features a 42mm Hardlex-Coated Steel case. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-f1209cdcc89c]

Also known as: Bullhead, Goldfeather

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
12.7mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
170m
Dial Color
Burgundy
Jewels
36j
Frequency
21,600 bph
Power Reserve
41 hours
Year
1975

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