Seiko Cal. 6631 - 664

Seiko 6631-664

This Solar model from 1971 features a 34mm Gold-Plated case. The Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-fdd55543fdf8]

Also known as: Shogun, Baby Tuna

Specifications

Movement
Solar
Case Material
Gold-Plated
Case Width
34mm
Case Thickness
9.3mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
120m
Dial Color
Green
Jewels
35j
Frequency
28,800 bph
Power Reserve
70 hours
Year
1971

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