Seiko Cal. 6390 - 928

Released in 1973, the Cal. 6390 with design code 928 was part of Seiko's domestic market collection. Powered by the 6390 caliber with 21j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-39ac93c90b30]

Also known as: UFO, Goldfeather

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

36mm

Case Thickness

11.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Champagne

Jewels

21j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1973

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