Metal leatherworking gauge

A metal leatherworking draw gauge. The gauge has a built in sliding ruler that runs through the handle near the center and measures up to four inches. The ruler is marked by engravings into the metal. At the end of the ruler there is a marking engraved into the metal that has letters, but it is difficult to read. At the other end of the ruler, there is a small screw that, when tightened, secures the sliding ruler. The ruler at the top of the handle there is another screw and a small space where a blade would be placed. When tightened, the screw would secure a blade.