Dcneuro, it's hard to say if it is an original prop from Bristol. I haven't come across any paperwork from the PO's indicating the prop was ever replaced. The prop is in good condition, but it's basic shape and poor performance would lead me to believe it is the original factory prop.
1972 Bristol 32, #64
"Our doubts are traitors,
And make us lose the good we oft might win
By fearing to attempt."