Lancasters propellers

Though I haven't checked the books, I think theprop story goes like this. The original props were the "needle" or pointy ones, made be Dehavilland, as on the Mk.I. The paddle-blade props were Hamilton-made and used on the Mk.III . The Paddle-blades gave a better high altitude proformance but were less efficient at lower altitudes. Don't quote my on this as I may be a ways off .

I think the early models (Mk I) were equipped with the toothblade (narrow blade) props while the late model Mk Is had the paddle bladed props - They were apparently retrofitted as I have seen photos of the same aircraft taken at different times in their operational lives in which both types of props are installed. Also there were two types of bomb aimers window (shallow and deep) which could be installed (depending upon the time) - you need to check your references for what type of props and bomb aimers windows were installed at the time for which you are modeling the aircraft.

The Hamilton propellers were also fitted to the Canadian built Lanc X. Basically if the engine was Packard it came fitted with a Hamilton prop.
I have also seen references to wooden props on Lancaster and Halifax aircraft, although I don't know if this was a wartime expedient or not. Can any one answer that question?