Nice original Porsche Mechanical Tachometer Drive assembly
Cast Magnesium Body
Fits the Porsche 906, 907, 910, .....
Check your vehicle for proper fitment
Driven off of the Camshaft 
I have had this professionally disassembled and resealed 
Reproductions are selling for $4,000
Call if you like: 843 639-9393
Price includes shipping to you via FedEx