Hi Wurger,
Thanks very much for the reply! Really interesting especially that the blade is part of a 3 blade prop. Are the DB numbers just the design of the blade, 739 signifying a newer design to 734? Also, I'm pleased to hear it might be from a Wellington (another family connection), am I correct in thinking that guess is based on numbers of Wellingtons with Bristol Hercules vs Lancasters with Hercules engines. Thanks for sharing your knowledge!