Steve,
First of all, many thanks for your praise...and your help! That's what my Flickr account is designed for: to share and build common benefit having a centralized and classified picture databank on an open base for all Bf 109's from the 1943 - 1945 time span.
As for the W.Nr. of the Erla W.Nr. built xxx 196, my conclusion after having blown up the image and fiddled around with contrast is that the third digit is a 3; this is the only numeral which fits what can be seen under the hanging camouflage net. This does exclude all Erla built Bf 109 G-10 in the 490xxx - 492xx batches and all W.Nr. 150xxx -152xxx as well.
This led me to an Erla built Bf 109 G-14, of which I do have five documented by pictures with their W.Nr. in your mid-rudder position (Position 3):
http://www.flickr.com/photos/2809206...7625539886908/
Bf 109 G-14 W.Nr. 464 362, unit unknown, Köthen, Germany, 15 April 1945. Source: Stockum Collection via stories.windmillpro.com.
Please note that this one has also a tall tail wheel leg.
http://www.flickr.com/photos/2809206...57625539886908
Bf 109 G-14 W.Nr.464 863 "Rote 863", 2./JG 1xx, Germany, May 1945 Forsyth 2005, p. 278.
http://www.flickr.com/photos/2809206...7625539886908/
Bf 109 G-14/AS W.Nr. 465 381, unit and location unknown, Germany, April 1945. Source: 4th infantry Div, 8th Inf. Regiment via Facebook.com
http://www.flickr.com/photos/2809206...7625539886908/
Bf 109 G-14 W.Nr. 465 763 "Schwarze 9", Oblt. Erwin Günthner, 3./JG 52, Neisse-Stefansdorf, March 1945. Source: Flugzeug Classic 3. 2012, p. 18.
http://www.flickr.com/photos/2809206...7625539886908/
Bf 109 G-14 W.Nr. 465 765, II./JG 52, Deutsch Brod, May 1945. Source:
http://www.asisbiz.com
W.Nr 463 196 would be thus the sixth case.
As for the long tail wheel leg, besides W.Nr. 464 380, I have also the above mentioned W.Nr. 464 362 and W.Nr. 464 642:
http://www.flickr.com/photos/2809206...57625539886908
Bf 109 G-14/AS W.Nr. 464 642 "Weisse 10", unit and location unknown, France (?), Summer 1945. Source: Collection Kees Mol.
One thing which I did not consider is that this could be a WNF built Bf 109 G-10. It could be considered, even if the highest recorded W.Nr. stops at 613 195 (II/JG 52, Neubiberg), according to Janda and Poruba 2004, p. 80. But no known occurrence of a tall tail wheel leg is known for WNF built Bf 109 G-10's...
There we stand, Steve. Not 100% sure but pretty confident.
Thanks again for your highly appreciated input
Marc