Seiko Cal. 6365 - 866

Seiko 6365-866

The 6365-866 is a sought-after Spring Drive piece from Seiko's golden era. The Fixed bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-fa4d3779b38b]

Also known as: Bullhead, Helmet

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
42mm
Case Thickness
15.1mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
30m
Dial Color
Blue Sunburst
Jewels
18j
Frequency
21,600 bph
Power Reserve
52 hours
Year
1984

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