Seiko Cal. 3866 - 960

Seiko 3866-960

This Automatic model from 1970 features a 40mm Stainless Steel case. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-8a70f0d918a8]

Also known as: Helmet

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
14.0mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
30m
Dial Color
White
Jewels
27j
Frequency
21,600 bph
Power Reserve
46 hours
Year
1970

Related Models

seikata-wm-8a70f0d918a8