Yours has a two screw patch box where the ones made in the USA had a four screw patch box. This is Spanish import. But that doesn't mean that it isn't a good gun. Mine is a Spanish import that I made from a kit and it is my go-to gun on shooting match day. Mine is a .50 cal and likes a .015 patch and 65gr of fffg. Have fun refinishing it. I agree that an oil finish is best. I used Permalyn sealer and then Permalyn oil finish followed by J&J paste wax.
Take time with the lock and trigger set up. CVA often inlet the trigger plate too deep and it interfered with proper function. Seeing as how you bout it used it may already bee set up correctly.
Take time with the lock and trigger set up. CVA often inlet the trigger plate too deep and it interfered with proper function. Seeing as how you bout it used it may already bee set up correctly.