135- H.P. Capricron S&D Milano

[Benjamin]

I purchased a propellor today and am trying to find out more about its identity/history.

It is approximately 78 inches long.

Markings include on one side:
C.1.78X16
172

The other side has:
135 H.P.
CAPRICRON
1
S.& D.
MILANO

Any help would be appreciated.