Seiko Cal. 6311 - 987

Seiko 6311-987

This Spring Drive model from 1968 features a 34mm Hardlex-Coated Steel case. The Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-1208271b1bf5]

Also known as: Helmet, Rally

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
34mm
Case Thickness
14.2mm
Lug Width
19mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
60m
Dial Color
Blue Sunburst
Jewels
33j
Frequency
28,800 bph
Power Reserve
57 hours
Year
1968

Related Models

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