Propeller identification

[austerj5p]

Hello everybody, Could anyone out there identify the following British Wooden propellor . I suspect it is a Horden Richmond copy of something else and I need to know who would be the maker and type of the original design and what aircraft that is likely to come from.
The markings are clear and show RS12/731 DRG 1281/1/AM D6.84 P3.53
HRA 184G
Hoping someone can help austerj5p

[Bob Gardner]

I can only tell you that it was made for the Gypsy III engine.

With kind regards,

Bob