Seiko Cal. 6647 - 788

The 6647-788 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6647 caliber with 24j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-2302d93990b3]

Also known as: Shogun, Bullhead

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

160m

Dial Color

Black

Jewels

24j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1976

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