Commercial Swiss Luger rig with Sunburst ?

[pisto]

Hello,
have had some good luck to get another Swiss Luger with matching holster.
This one seems first to me to be a 06 Sunburst ,
but the serial number 4404 is belonging to the 1900 models.
then I recognized a suffix letter on the frame below ser.nr. "n" - I could find out that it must be a commercial Swiss Luger.
Never heard that before, but here are the pics:
It came with a 1924 wood bottom mag, but I replaced that into a metal disc mag, which I made by myself - don�´t know which magazine would be
more correct?
http://forums.lugerforum.com/lfupload/simg0002.jpg
http://forums.lugerforum.com/lfupload/simg0003.jpg
http://forums.lugerforum.com/lfupload/simg0004.jpg
http://forums.lugerforum.com/lfupload/simg0006.jpg
http://forums.lugerforum.com/lfupload/simg0008.jpg
http://forums.lugerforum.com/lfupload/simg0009.jpg
http://forums.lugerforum.com/lfupload/simg0010.jpg
http://forums.lugerforum.com/lfupload/simg0011.jpg
http://forums.lugerforum.com/lfupload/simg0013.jpg
http://forums.lugerforum.com/lfupload/simg0015.jpg
http://forums.lugerforum.com/lfupload/simg0016.jpg
http://forums.lugerforum.com/lfupload/simg0018.jpg
http://forums.lugerforum.com/lfupload/simg0017.jpg