cpt-t: Never mind about the computer or camera, I was curious about the markings on the slide and you rewrote them perfectly.
For the beginning, here is the link provided by AZ_CZ about CZ pistols and there is info also about DUO pistols: http://unblinkingeye.com/Guns/2CZ25s/2cz25s.html
Basically and in simple way, there were three periods during the production of DUO pistols:
1. Prewar, with the F. Dušek, Opočno on the slide (the strange characters Š in Dušek is similar to "sh" in english word "shock" and Č is similar to "cz" in Czech),
3. After the war and nationalization of F. Dusek company, those pistols were marked Pistole model Z, Made in Czechoslovakia
2. War production of DUO pistols in the occupied Czechoslovakia, when František Dušek's company were seized by Germans. During this time, about 100 000 DUO pistols were made, as they were popular in Germany. At this time, they were signed Automat. pistole DUO, and F. Duschek, Opotschno. Duschek and Opotschno are in german transcription of those Czech names (sch=š and tsch=č). As you can see, you have the wartime model, by the sign 41 it was made in 1941.
Well, I do not think you have something "special", but as I know, wartime relics are quite popular, so it should be more, than average price of DUO pistol, but I do not know much about U.S. market and prices.
The speciality of your gun is in its family history and it is a way much more, than any damned money