sbuff: Nope! Two different Mausers. The VZ 24 is a standard 98 action built for the 7.92x57mm (8mm) .323 bore cartridge. The Yugo is also a Mauser but slightly shorter action than the VZ; bolts do not interchange. I find my Yugo handier than my VZ. Both have/had new bores when I got them and both shoot incredibly well. Stock differences vary and I am no expert on stock identification.
Century Arms International (CAI) is the company in St. Albans, Vermont that imported your rifle. The crest on the receiver authenticates the manufacturer, or at least the purchaser. I have also seen unmarked M48s - contract rifles. If the 'S' is a original strike it means one thing, if the strike is similar to the CAI style markings it probably means 'safe'.
The markings you describe are consistent with the style used at Factory 44 when they rebuilt the VZs with new barrels (probably including serviceable k98 barrels), bolts and stockwork and it's really nice to see a rifle that still carries its crest; some appear crudely removed....
8mm (slang term, actually), 7.92x57mm and the 8x57JS describe the correct cartridge for that rifle. The cartridge is actually a 7.92x57mm round and mil-spec on this round was a 198 gn .323 caliber Spitzer bullet at 2500+'/sec. American made casings for this cartridge are given the same case head dimentions as the 30-06 family of cartridges. The case is rimless. Sellier and Bellot and PRVI are the best ammo sources available. Check Mid-South and the other places like Natchez, Cheaper than dirt, etc. for the ammo. The round is a real thumper with the original European loadings; American loadings from Winchester and Remington are loaded way down and are little better than a 30-30.