Seiko Cal. 6390 - 490

The 6390-490 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 60 hours power reserve. [seikata-wm-571311e6991e]

Also known as: Monster, Panda

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

160m

Dial Color

Burgundy

Jewels

20j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1989

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