Seiko Cal. 6631 - 763

Seiko 6631-763

This Quartz model from 1975 features a 42mm Gold-Plated case. Powered by the 6631 caliber with 18j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-b80d0fb7f600]

Specifications

Movement
Quartz
Case Material
Gold-Plated
Case Width
42mm
Case Thickness
11.9mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
50m
Dial Color
Burgundy
Jewels
18j
Frequency
28,800 bph
Power Reserve
68 hours
Year
1975

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