Seiko Cal. 4488 - 518

This Spring Drive model from 1980 features a 40mm PVD Black case. Powered by the 4488 caliber with 21j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-d3abcc01d126]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Champagne

Jewels

21j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1980

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