Seiko Cal. 3866 - 781

Seiko 3866-781

The 3866-781 is a sought-after Hand-Winding piece from Seiko's golden era. The Fixed bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-9bfa8761af5c]

Also known as: Bullhead, Sea Horse

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
38mm
Case Thickness
13.5mm
Lug Width
20mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
140m
Dial Color
Champagne
Jewels
26j
Frequency
36,000 bph
Power Reserve
56 hours
Year
1976

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