Welcome to Our forum. We are happy you joined, and posted the picture and the info about the DUO. Actually you beat me to it. I have 2 along with the next one in line the .25 Z which is actually the DUO but made officially by CZ, if I got that bit correct. And then there is the CZ 1945, all of which are .25 calibre.
That one you posted is in Very good shape as near as I can tell from the picture, and I'm not surprised it wasn't for sale!

I certainly wouldn't sell it if it was mine.
As for the Nazi things, well you might have done better to not have used them, but in fact you are correct in that the Germans used then as soon as they could get to distributed to the troops. Actually there are a couple CZ's that were made for a year or so before the war that the Nazi confiscated, and no more were ever made. So it's a toss up on the extra stuff, and I'm not going to do anything about the picture. (BTW I'm Jewish) That really is about the nicest DUO I have ever seen and it deserves being shown, and if I can live with it then so can everyone else. Just don't do it again if you please. I also saw your post on the Welkom Board, so I realise that you are from South Africa (and I have been there on business and it was a fantastic place to see and be in) and things are way different there then most anywhere else in the world except possible Argentina.
PLEASE Note: Where ever you got the picture please post the link and credits for where you got it. There are copyright laws and the owner of the pic MAY take exception to not being credited. Thanks. Frankly if you can find a different shot of one that is in that good of condition, it may want to swap them out, and don't forget the credits.