The Vacuum regulator. It gives you the possibility to adjust the vacuum pressure in flight. The same instrument was used in all the italian aircraft of WWII , including the italian Bomber SM 79

 

 

 

 

A rear view



 

 

 

A look to the Vacuum regulator disassembled



 

 

Cleaning the knob



 

 

The instrument.



 

 

And now assembled and well cleaned.



 

sdsd