Ok quick scan through my references, show that squadron are great for pics but unit deatils they suck, lol
This image is from Squadron signal, Armor in Action, Panther book
There is also another image in same book of same type scheme in France, no date, not sure how accurate.
Otherwise a collection of images I have gotten off the web, first two show date and local, third is the image that shows lack of cammo on the roof.
As for units I cant find anything more specific than localities/dates images were taken, if you knew where certain units were at these times you may be able to infer from that. I do remeber one of the sites I saw had a list of the factory that did this scheme and when. I also know there are lists on the web that list when units recieved replacement tanks and from which factory, if you can find these you could also put 2 and 2 together.
Andrew