Seiko Cal. 6231 - 963

Seiko 6231-963

The 6231-963 is a sought-after Spring Drive piece from Seiko's golden era. The Fixed bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-43bad19dbba1]

Also known as: Helmet, Navigator

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
35mm
Case Thickness
11.8mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
150m
Dial Color
Green
Jewels
33j
Frequency
21,600 bph
Power Reserve
55 hours
Year
1971

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