Seiko Cal. 3817 - 331

Seiko 3817-331

The 3817-331 is a sought-after Automatic piece from Seiko's golden era. It features a White dial protected by a Hardlex crystal and offers 130m of water resistance. [seikata-wm-a21aa7800d11]

Also known as: UFO, Baby Tuna

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
35mm
Case Thickness
15.1mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
130m
Dial Color
White
Jewels
20j
Frequency
36,000 bph
Power Reserve
71 hours
Year
1978

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