In bbf (http://www.buntbahn.de/modellbau/viewtopic.php?t=10195) I found an interesting link about Orenstein & Koppel General Export Catalogue Number 600!
You can download a PDF file: http://www.zelmeroz.com/album_rail/euro/misc/O&K-Cat600.pdf
At 73 pages there are a great treasure trove for all who love the light railway!
Enjoy it like I did!
Frithjof
Thanks Frithjof! Great find, I have some of their catalogs, but not this one.
Marc