Seiko Cal. 6390 - 777

Released in 1985, the Cal. 6390 with design code 777 was part of Seiko's domestic market collection. Powered by the 6390 caliber with 27j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-2a091bf20ccd]

Also known as: UFO, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Burgundy

Jewels

27j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1985

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