Conduit Bender Markings (Tool)?

I believe that the asker has bought an early version of a modern day conduit bender. I remember learning to bend conduit with a bender with no markings. A few years later I saw a wookmate that had a bender with markings. I thought that was the coolest thing. Of course now all benders have the markings on the sides. I'm not sure how to measure and describe the markings to you in a way that you could duplicate them.