Three Braun calculators, ET33, ET55 and ET66, designed by Dieter Rams and Dietrich Lubs, 1977 - 1987 . and inspiration for the iPhone design Stock Photo - Alamy
Design icon: Braun ET-66 calculator - the design that influenced Apple | Design talk with Cheedi - YouTube
1987 Braun calculator ET66 by Dieter Rams | Openverse
Dieter Rams: Less but Better — The BYU Design Review