Hi Jon,
As long as it is understood that what follows is purely speculative, I will add my two cents.
To my eye there is a slightly darker delineated hue to the area immediately behind the white ring in the nose cone of "AL" that matches the size and shape of the larger nose colour of a KG 51 aircraft. This with the single white gun instruction rectangle suggest that "AL" was an early Me 262 A-2a that was seconded to KG(J) 54 from KG 51 for training purposes.
Below, if you log in, you will find three photos of Me 262s of 1./KG 51.
http://forum.12oclockhigh.net/album....&pictureid=566
http://forum.12oclockhigh.net/album....&pictureid=565
http://forum.12oclockhigh.net/album....&pictureid=560
I suggest that the camouflage of "AL" is the same as that of these aircraft and point out that the lower squiggles on the visible engine nacelle are quite similar to those on the rear fuselage of "AL".
It would be interesting to know if the tail and rudder tip has a delineated area slightly darker than the rest of the tail suggesting a previous tail tip colour.
best regards,
Jim