Seiko Cal. 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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