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Roundels....What I read was "From early Jan.'45, all 2nd TAF had their invasion and fuselage stripes painted out, spinners painted black and all roundels modified to type "C1"-red/white/blue with a narrow yellow outer ring"
Bit more complex than that I'm afraid.
The roundels were certainly changed, but spinners, and AEAF stripes, varied in their changes.
Theoretically, all 2 TAF aircraft were supposed to have black spinners, from late 1943. However, various orders and counter orders, specific to Wings, changed this back to 'Sky' spinners for some units, and confusion arose, not to mention anger. The anger mainly due to aircrew asked to undertake low-level ground attack, with, suddenly, a 'Sky' spinner acting as a marvelous aiming point for light flak and other gunners!
Consequently, variations of 'regulation' and actual combinations of these markings can be found, although after about late July '44, the AEAF stripes were removed from upper surfaces, but again, this resulted in varied examples of the stripes presentation.
Bottom line- each specific aircraft needs to be checked for these details, depending on location, and dates - the latter sometimes measured in days.
It's not as complex as it seems at first Cory - the stripes are fairly straightforward, as are the roundels. Spinners should be black, but factory or M.U. replacement aircraft arrived in 'standard' day-fighter scheme prior to January '45, and after, so, with no time to re-paint, they often went into immediate service as is.
Again, the date period, location, and more importantly, the specific airframe, dictates what was what.