Seiko Cal. 6390 - 552

The 6390-552 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6390 caliber with 20j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-e93ef282fd2f]

Also known as: Monster, Panda

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

160m

Dial Color

Black

Jewels

20j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1966

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