Seiko Cal. 6390 - 666

This Solar model from 1973 features a 43mm Gold-Plated case. Powered by the 6390 caliber with 25j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-8c1c621e075a]

Also known as: Helmet, World Timer

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

14.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Green

Jewels

25j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1973

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