Atlas Steel Weight Calculator

1963 Atlas Steel's Weight Calculator made from card by Perrygraf, The units are Imperial. The upper side is for plates, flat bars, strips and sheets; angles; bar stock; and structural shapes. The lower side is for circles and rings. There is also a table of US Standard Gauges. Used in Engineering, Tool and Die, and Machining. Fantastic for an item of cardstock this old. This is from my Father in Law's collection.