What's the story with the "?-GA" markings on the Curtiss?
Glad you mentioned that. I did know the significance of the ? but I've forgotten. I looked carefully but there was no mention of it on the placards in the museum. I think it's the personal marking of a specific pilot but could be wrong about that. It represents a 112 Squadron aircraft in Desert Air Force colours & according to the Hendon website this example is a Kittyhawk IV (P-40N).
Maybe one of our historical gurus can elaborate. Charlie, Felix, Ozzy, Tempest.......?
PS. Found it.
The second thing is the use of the query punctuation mark as an individual aircraft ident marking; the use of such symbols and shapes (such as, eg, colons, semi-colons, and diamonds) was not unusual in Italy when a squadron had more than 26 aircraft on strength, and the use of "?" was the most common, even at times in the UK itself. Indeed, the "?" mark was often used to indicate the aircraft of the squadron commander, though not always so as in the case of this aircraft. Once again this is painted over the top of the serial number, FX740.
http://www.ipmsstockholm.org/magazine/2000/03/stuff_eng_profile_112sqn2.htm