Seiko Cal. 6278 - 178

This Spring Drive model from 1973 features a 34mm Hardlex-Coated Steel case. Powered by the 6278 caliber with 24j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-de90317a2f76]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Cream

Jewels

24j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1973

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