Monkey wrench made by Nihon Riki (currently Lobtex), a long-established Japanese tool manufacturer. With JIS mark. 6 inches, actual size 155mm. Known as the Ebi (Shrimp) brand, this is the more affordable Snail brand. Due to the inch markings, it is believed to be from the 1950s. It has been used, so there are rust, scratches, etc. Please purchase with understanding. I also have other old monkey wrenches and pliers for sale, so I would appreciate it if you would take a look.