properller

The marks are RA 8812 17 17 DRG I'm 41 and I'm a portuguese II world war aircraft enthusiast and old artifacts and need some help to identify blade properller.

Hello world of ww2 aircraft! recently i have come into contact with these two beautiful chromed stand alone propellers (pictured below) i have been told they have come of a Lancaster Bomber, however they seem to be the wrong size and shape... in order for me to sell them i desperately...