Seiko Cal. 7028 - 534

The 7028-534 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7028 caliber with 29j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-aaf102871fe2]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Cream

Jewels

29j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1974

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