1920s wooden prop.

[Turbofan700]

Long time watcher, first time lister.....

Any thoughts if this is a German or Italian prop?
Markings:

D-N1-N256
D-320
P-180
31-12-24


Not mine but claim is that it was on a 250 hp Maybach engine.
Length of prop is 126”

[Dbahnson]

I think that one is going to be very hard to identify. Not all, but I think "most" German props had the engine name stamped on the hub.