Jim, thanks for the info and the welcome! I'm definitely going to take it to a gunsmith and have it checked out before I take it to the range. I'm thinking I'll have them do a chamber casting as well to be on the safe side. I sure like the looks of the gun. I'm sure it will look a lot better with a good clean up.Over all, that is a really nice '93 you have!
The numbers don't match. The thing that concerns me is mostly that the bolt numbers don't match the receiver numbers - so the bolt may well have been swapped. If that is the case, the head-space may be off. I'd have it checked before firing for safety (and to keep all of YOUR parts original).
Another thing - your rifle is loaded with cosmoline (a preservative grease). That is typical for stored service rifles. You need to strip it down completely and clean the daylights out of it - to include the interior of the bolt body and mainspring inside of it. A spray can of carburetor cleaner works well for that - but be sure to lightly oil it afterwards. The cleaner removes all of the oil and grease, and the metal needs protection or it will rust. If not removed the firing pin and main spring will become sluggish and may fail to fire. Also, if left inside of the bolt the old cosmoline can become packed into the interior of the bolt and keep the firing pin from operating.
As far as caliber, I suspect that it may well be 7mm Mauser. Most Spanish military Mausers were in that caliber, except for rifles built for export to South America. The 7mm Mauser is an outstanding caliber, generally powerful enough for big game hunting and moderate in recoil. The '93s are sweet rifles. They are not as strong as the later '98 Mausers, don't have the 'cock-on-opening feature of the '98s, and don't have the 3rd locking lug on the bolt - but they are still terrific firearms.
Welcome to TFF!