Seiko Cal. 7028 - 256

Released in 1970, the Cal. 7028 with design code 256 was part of Seiko's domestic market collection. With its 19mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-869e811fe4bc]

Also known as: Sumo, UFO

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

40m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1970

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