The Fox is a rare and truly obscure, early CZ. I've never seen one, but according to Berger's book, it was developed after WWI by Alois Tomiska, who had a decade earlier designed the first double-action self-loading pistol, the Little Tom. He hoped to interest the military, but failed. The Fox was designed in a manner that was popular in central Europe, using a solid frame to enclose the slide/bolt inside. The gun was probably produced only from about 1919 to about 1922. In 1922 the design was part of a merger that became the more famous Ceska Zbrojovka firm, and a trigger guard was added and the pistol became the Vz 22. It is quite rare. I don't know its value, but CZ collectors will be really interested (if they have 12/6 status). It's really a collectible and not a shooter. I can't post pictures on this site, but if you wish me to, I can send a photocopy of the page describing the pistol from Berger's book. I imagine your friend's best bet to sell (if you don't want to keep it) would be in the US. Your friend has an interesting and unusual little pistol.
