Maybe my reply was a bit terse. Sorry.
CZ 24's were made in several calibers. The most common were 7.65mm (a.k.a. .32 ACP) and 9mm Kurz (a.k.a. .380 or 9 Short or lots of other names). I saw one on a web site once in .22 rimfire. The differentiating design details are a rounded contour to the slide cross-section (instead of the CZ 27's slab-sided slide) and a gentler curve to the underside of the slide where it transitions into the trigger guard than the earlier pistols had, like the CZ 22. CZ 22's are really rare, and I've never actually seen one with my own eyes.
CZ 27's often have names other than "CZ" on them, and often have Nazi acceptance stamps on them. They often have white paint in the stampings, which makes an odd contrast with the gray or black finish on the pistols. That white paint seems to last better than the original parkerizing or bluing.
Someday, after I get the kids through college, I want to start collecting all these old CZ pistols. I envy you folks who can do it now.