"Pro" Golf Ball Marker, No. 4800, in original box. It engraves your full name (if you wish) onto any golf ball. It includes the mechanism, package of metal letters and instruction sheet. made by United Metal Products, Detroit, Michigan. It had been used when I purchased it. I cleaned off most of the ink that was on the surface of the base. There is a name currently attached to the base: George Milburn. The plaque unscrews from the base and you can change the name using the letters provided in the paper envelope.