Seiko Cal. 5678 - 831

This Solar model from 1978 features a 34mm Hardlex-Coated Steel case. Powered by the 5678 caliber with 20j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-77247850c809]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

9.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Cream

Jewels

20j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1978

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