Three Casio digital watches, 1990s.
© Science Museum / Science & Society Picture Library
Three watches manufactured by Casio Electronic Company Ltd. On the left is the Model PRT-40E with altimeter, barometer and thermometer functions. In the middle is the Model VDB-200B-1 with touch screen, back light, stopwatch and addres book functions. And on the right is the multi-function Casio digital watch with built in infra-red transmitter to control household appliances.