Hello everyone, just joined. Been reading and enjoying this website for a while, not techie and never joined a forum before. My question to people more intelligent them me is, I have a cool I believe very early Craftsman Tools level and Square,both measure 18 inches. Good size square, I believe there was etching of some type on the squares metal, not readable anymore. Can’t find anything on these two, my guess is a presentation set or a salesman sample showing off a new companies quality, the logo burned into both I believe is the original logo design that was used from 1928 to mid 1930’s. I will now try to add images, thanks for looking any help would be great. Also the square handle has a metal knob, that facing into the square. Can’t figure out what that is either.