Fototimer.

The Fototimer is a battery operated photographic process timer, using a 9 volt PP3 type battery. There is an on/off switch at the side of the unit. The four white switches on the top set the time in minutes. They set 1, 2, 4 and 8 respectively, giving a total time of 15 minutes if all are depressed. The timing is started by the red button and a beeper sounds when the time has elapsed. A red LED on the front of the unit flashes while the timing is under way. The battery compartment can be seen on the back of the unit.

David Tomlinson.