Ed,
You found a real gem here:
http://www.ebay.com/itm/Original-Lot...item257a33ec18
Among the 21 pictures taken by John E. Mucha, 188 Signal Repair Company are at least two Bf 109 K-4's. One of them shows Bf 109 K-4 W.Nr. unknown "Rote 21", probably 2./JG 27. Thanks to the caption written on the reverse, it is now clear this and the other machine, were found near Braunschweig and pictured 5 May 1945. Two other pics from "Rote 21" are known and can be found here:
http://www.flickr.com/photos/2809206...57625380126592
http://www.flickr.com/photos/2809206...57625380126592
http://www.ebay.com/itm/GERMAN-JUNKE...item20ceea0959
This is in fact a He 111 H.
Many thanks, Ed
Marc