Seiko Cal. 6399 - 850

The 6399-850 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6399 caliber with 35j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-a51f5eba6006]

Also known as: Monster, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

13.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

35j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1969

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