This vintage slide rule chart from 1963 is a great addition to any collector's collection. It is a Buss motor protection guide calculator that is perfect for those interested in science and engineering. It has been previously owned, but its functionality and usefulness have not been compromised.

The slide rule chart is categorized under collectibles, science and medicine, engineering, and slide rules. It is a rare and unique piece that is sure to impress. Don't miss the opportunity to own this wonderful vintage item.