Seiko Cal. 6391 - 492

This Solar model from 1966 features a 40mm Titanium case. Powered by the 6391 caliber with 28j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-821c5449bbe8]

Also known as: Tuna, Emperor

Specifications

Movement

Solar

Case Material

Titanium

Case Width

40mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1966

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