Hewlett-Packard HP 55 Programmable Scientific Calculator. One segment of one digit is not working. Otherwise this is a very clean and functional unit. Outstanding key press feel. Cosmetically very good. Apparently, this unit was serviced by Hewlett-Packard in Corvallis. Item may contain scuffs, scratches, markings, dirt and other imperfections. No batteries or wall charger included. Sold as-is, no returns.