Seiko Cal. 6631 - 607

Seiko 6631-607

This Solar model from 1972 features a 46mm Gold-Plated case. Powered by the 6631 caliber with 27j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-7688b88971b6]

Specifications

Movement
Solar
Case Material
Gold-Plated
Case Width
46mm
Case Thickness
8.7mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
80m
Dial Color
Blue Sunburst
Jewels
27j
Frequency
28,800 bph
Power Reserve
44 hours
Year
1972

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seikata-wm-7688b88971b6