Seiko Cal. 6390 - 991

This Hand-Winding model from 1975 features a 42mm Titanium case. Powered by the 6390 caliber with 24j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-64fce3bc8290]

Also known as: Flighty

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Cream

Jewels

24j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1975

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