Good working HP-42S RPN Scientific Calculator. The screen has spots of dead pixel s on the edges of the display as shown by pen tip. The calculator passes self test and works great.Includes batteries and CD with HP-42S Owners Manual. The item "Vintage HP 42S RPN Scientific Calculator" is in sale since Monday, April 27, 2020. This item is in the category "Business & Industrial\Office\Office Equipment\Calculators". The seller is "kobel-co" and is located in San Jose, California. This item can be shipped to United States, all countries in Europe, Canada, Australia.