Ages, stone, iron, wood, mechanical, electric, electronic, space, atomic, computer?. There is one thing that advances with the ages and something quite marvellous happened in society in the 20th century, synchronisation of time. Without a clock, nothing can be synchronised. The small cooper cased device shown was part of the Essen Ring drives of the BBC. This was the beating heat of the BBC, oven controlled and monitored by the National Physic Laboratory. Without devices like this, images and sound could not be recorded or transmitted at a given time. The camera had a clock, transmitter and your TV. In the same way Harrison clock gave us advanced shipping technology, the quartz crystal oscillator opened the door to the electronic and computer ages. That changed the world we live in.