Vintage Woodward propeller governors CSSA type Hamilton Standard series 1P12-A and the Woodward series 400810 
The Hamilton Standard type 1P12 propeller engine governor manufactured by the Woodward Governor Company in 1953
The Hamilton Standard type 1P12 propeller engine governor manufactured by the Woodward Governor Company in 1953
The gear end
The engine gear end
The propeller governor body dissassembled
HAMILTON STANDARD TYPE 1P12-A MADE BY WOODWARD
Hamilton Standard propeller governor patent name plate on the type 1P12-A control
View of the propeller engine governor type 1P12 component assembly 
The oil pump taken off the governor body
Another view of the parts in the governor.
A vintage governor type 1P12 taken apart
The gasket on the bottom of the governor
Constand speed control type 1P12-A 2 
Constand speed control type 1P12-A