Well, 3 Sqn RAAF, and 112 Sqn RAF, Desert Air Force were flying the Kittyhawk (P-40E) in December 1941.
The 109E and the P-40B (Tomahawk) were the two main types from late 1940-41. As well as the HurricaneI, the MC200 (AH doesnt have it), and the usual LW attack a/c and bombers.
There is nothing unhistoric in the lineup, they saw action against each other. If you take out the P-40E you have to take out the MC202, its in the same category, and they were in service at @ the same time, late 1941 onwards.
I think not having the P-40B doesnt make much sense, it might as well be included, since the P-40E is already there.
Its really an early 1942 setup, but thats ok too, isnt it?