Danfoss refrigerant ITHO conversion slide rule Denmark 1960 Holland

This is slide rule specially made for quick conversions used in the refrigeration sector. Made by Danfoss Denmark and printed with ITHO a dutch Company name. It is printed thin plastic sheet with various values (like Fahrenheit and Celsius scales), which can be quickly converted using the simple double side cursor with single hairline. It also comes in the original signed sleeve which has the slide rule name “Refrigerant” on it in various languages. Everything is in very good condition with some signs of use (mostly scratches on the cursor). It measures ca. 20 cm or ca. 8 inches wide. Check the attached video on how to work your vintage man tool : slide rule operation instructions!