Can’t help you with RA406 but here are a few possibilities for right handed props with similar numbers.

RA4060 Whitley
RA4065 & RA4067 Hurricane

Anne

My I recommend that Sir frequents Messer’s eBay and looks for the 1943 Paul Elek Publications book titled “Aeroplane Production Yearbook and Manual (1)”. This contains a compilation of articles originally published in that first class periodical ‘Aircraft Production’ and will tell you all you want to know about the techniques used in the British aircraft industry during the early 1940s. Along with in depth articles on the construction of the Miles Master and Supermarine Spitfire there is, from pages 274 to 287, a very nicely illustrated article on the techniques used on the Wellington. If the thought of constructing of the rolling mill used to bend the geodesics into shape doesn’t scare you then you are a better person than I.

Anne

I think it would be referring to the length of the spars in that section of the lower main plane.

Anne

I am passing no comment on the items highlighted above but a search of collector’s forums will reveal that the eBay business associated with that site has earned a less than envious reputation when it comes to the history associated with some items.

Appears to be one attached to a G.28 here.

http://navigator.rafmuseum.org/results.do?id=128242&db=object&pageSize=1&view=detail

Anne

Just to flesh it out a bit more.

R.13/4F5/6 Prop, RA.10108 Dural blades

R.13/4F5/6 Prop, RA.10107JT Jablo blades

R.14/5F5/2 Prop, RA.10129 (JT,RTS or JCS) Jablo blades

“Did Rotol change the colour of their ID disks after the war?” Not after but during the war. Sometime about 1942-43 Jablo blades standardised on the pink/red disks. Prior to that Jadlo blades with a Rotoloid covering used a white disk. Just to confuse matters the white disks were later used to signify Dural blades.

The colour of the disks on Jablo blades range from a dull matt pink to a the more common dull matt red depending on which subcontractor made them. The colour illustrated in the photo of the IWM Spit 24 is possibly a bit too intense although I should take some of the blame for that as I spent a very pleasant day Duxford advising them on the blade markings.

Anne

Ah yes, a standard Air Ministry issue fire bell which are, thanks to that clip, always sold as scramble bells for silly amounts of money. They were still in use at the fire points on RAF Stafford well into the early 2000s.

I don’t know where the bell ringing was filmed but scene that follows shows 602 Sdn members running to their Spitfires at Prestwick during the filming of ‘A Yank in the RAF’ in late 1940.

Anne