Seiko Cal. 0731 - 630

Seiko 0731-630

The Seiko 0731-630 represents an important milestone in Seiko's 1970 lineup. Powered by the 0731 caliber with 30j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-761717372d7e]

Also known as: Bellmatic

Specifications

Movement
Hand-Winding
Case Material
Gold-Plated
Case Width
36mm
Case Thickness
10.5mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
70m
Dial Color
Champagne
Jewels
30j
Frequency
21,600 bph
Power Reserve
70 hours
Year
1970

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seikata-wm-761717372d7e