Split-flap display

A split-flap display, or sometimes simply flap display, is an electromechanical display device that presents changeable alphanumeric text, and occasionally fixed graphics.

Often used as a public transport timetable in airports or railway stations, as such they are often called Solari boards after display manufacturer Solari di Udine, of Udine, Italy, or in Central European countries they are called Pragotron after the Czech manufacturer.