Seiko Cal. 6399 - 730

The 6399-730 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6399 caliber with 21j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-b656aecd79ce]

Also known as: Crown

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

11.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Cream

Jewels

21j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1971

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