Seiko Cal. 6331 - 387

Seiko 6331-387

This Solar model from 1974 features a 38mm Hardlex-Coated Steel case. The Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-a6477d7419af]

Also known as: Tuna, Silverwave

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
38mm
Case Thickness
14.2mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
140m
Dial Color
White
Jewels
30j
Frequency
36,000 bph
Power Reserve
44 hours
Year
1974

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