Seiko Cal. 7138 - 403

The 7138-403 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 7138 caliber with 31j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-560f981b1ef2]

Also known as: Sumo, Crown

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1970

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