Welcome back to the Forum! As others have stated, you don't have a S&W top break revolver...you have a foreign copy. Back in the day, both foreign and USA revolver manufacturers copied the S&W designs and made cheap replicas. They would shoot OK, but they were not the most dependable or well made revolvers. Years ago a friend asked me to clean up an old top break revolver that his grandfather had hanging in a frame on an outside wall. It was an Iver Johnson top break, basically a S&W copy, in worse condition than your revolver. It had hard rubber Iver Johnson "Owl" grips, similar to the grips (Spanish?) on yours. These molded hard rubber grips were pretty standard on copies as well as on S&Ws...usually only the monograms and decoration around the grip screw were specific to individual manufacturers. I haven't a clue as to who manufactured your revolver. I cleaned up my friend's revolver the best I could by soaking it in a mix of ATF & acetone, then gently polishing it with Flitz Polish and a microfiber cloth, and finished with some Renaissance Wax. I told him to hang it back up on the wall and consider it a family conversation piece. Finding any replacement parts for your revolver may prove very difficult, but you might get lucky. I would suggest just soak it (should free up any rusted parts), polish it up, put it back together, and enjoy looking at it. Good luck, and have fun!