I've got a couple of CZ-52s and three Tokarevs, and have bought a lot of 7.62x25mm Tok, and have never seen any made by Fiocchi. I wonder if he wasn't thinking of S&B, who makes some of the best 7.62Tok ammo and confused it with Fiocchi?
Like Scott said Fiocchi makes the 7.62 Nagant which is a bizzare revolver round, which has the bullet enclosed in the brass case. They're an interesting designed revolver, in which the cylinder moves forward when shooting, and the extra long case seals the gap, between the barrel, and the cylinder. This prevents the loss of pressure revolvers suffer from, and makes it one of the few revolvers that can effectively use a silencer. However these are a rimmed revolver cartridge and no way will they work in a CZ-52.