Seiko Cal. 6631 - 565

Seiko 6631-565

This Kinetic model from 1965 features a 42mm Two-Tone case. Powered by the 6631 caliber with 36j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-1c6afe1c9ff0]

Specifications

Movement
Kinetic
Case Material
Two-Tone
Case Width
42mm
Case Thickness
10.5mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
110m
Dial Color
Champagne
Jewels
36j
Frequency
28,800 bph
Power Reserve
54 hours
Year
1965

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