Hallo again Alex
The Avions book was written by Jaun Arraez Cerda in 1997, BUT there has also been some articles by a guy named Gonzalo Avia Cruz, first in Flugzeug 5/96 and later in Air Enthusiast 87 (May/June 2000). There the story is slightly different with regard to the Wnr and also differes between themselves.
In Flugzeug the WNr is the same as in my list, EXCEPT that he states 7237 is in fact 7327. He maintains that in his later AE listing, so Avions might well be a misprint...
In Flugzeug he specifies that after some "further" research he has come to the conclusion that 6-145 must be WNr 10062. This is however changed in his AE article where he lists the same airframe as WNr 7539. As far as I can see he just makes the statement without any comments.
In the Flugzeug article he is NOT certain about 6-144 and lists this one as EITHER Wnr 5789 OR 7539 while in AE he seems certain that WNr 5789 is the correct one. Why he has finally arrived to the following list is not stated, but I list the WNr once again as they were in the year 2000, since that is the last listing I have!
12638,7327,7341,7486,8172,12906,13106,13110,13210, 13329,8328,8205,5789.7539.
Chrystal clear Alex?
Cheers
Stig