Seiko Cal. 5628 - 138

This Spring Drive model from 1983 features a 46mm PVD Black case. Powered by the 5628 caliber with 17j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-55b09340298e]

Also known as: Sumo, UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1983

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