Seiko Cal. 7148 - 731

The Seiko 7148-731 represents an important milestone in Seiko's 1970 lineup. Powered by the 7148 caliber with 28j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-3205837e02fc]

Also known as: Sumo, Crown

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

35mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1970

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