Seiko Cal. 6390 - 612

The 6390-612 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6390 caliber with 29j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-9e3c6ae4aa13]

Also known as: Emperor, Flighty

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Black

Jewels

29j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1965

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