Seiko Cal. 5648 - 990

The 5648-990 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5648 caliber with 28j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-d4d60510df4a]

Also known as: Crown, Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

14.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Cream

Jewels

28j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1986

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