Seiko Cal. 6378 - 873

This Solar model from 1975 features a 34mm Hardlex-Coated Steel case. With its 18mm lug width and 15.3mm profile, it sits comfortably on most wrists. [seikata-wm-5cca7294e708]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

White

Jewels

33j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1975

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