Interwar prop?

Hi folks

I need to identify a wooden propeller which I have been offered.
B12090 is stamped into the boss, and it is 7 feet long with an 8″ chord and there is a brass strip protecting the leading edge of the blades. The rest of the blade is polished wood, so if there ever were any othe numbers on the fabric covering, they ain’t there now….

Thanks in advance

JK