I do any stamping by hand. I know they make embossing machines that you can load with dies that press a design in the leather and you turn a crank to feed the leather through. That's a quick way to make a design on a belt but the dies are usually only 1", maybe 1 1/2" wide and the embossing machine and the dies are very expensive. Places like Tandy sell belt blanks stamped like that as well as the machines. Something like this one is hand stamped ~