Hi Rick,

I worked a lot on the 1:200,000 Generalkarte. The problem is that for the 265 boxes of the sheet index I have cataloged more than 3700 different sheets published before 1918. I found more than 20 different sheets for several boxes.

These sheets are scattered in more than 20 european map libraries and there are few reproductions. However, I have reproductions in 300 DPI for an almost complete set (most of the sheets dates from the end of the period). If your customer is interested he can contact me directly.

 Your patron can also consult this paper : 

Arnaud, Jean-Luc, 2013, “The long life of a 1:200 000 map of Central Europe and Balkan”, chap 7 of  E. Liebenberg, P. Collier and Z. G. Török (éd.), History of Cartography: International Symposium of the ICA, 2012,  Berlin, Heidelberg, Springer-Verlag, p. 111-128. 

http://books.google.fr/books?id=mRV_AAAAQBAJ&lpg=PA111&ots=pfq6ljhbiZ&dq=Arnaud%20%22Central%20Europe%20and%20Balkan%22&hl=fr&pg=PA111#v=onepage&q&f=true