Zenith quartz watch with both analogue and digital display, 1976.

Casio digital watch, model VDB-200B-1, 1997.

Collycroft worsted textile mill, Bedworth, Warwickshire, c 1790.

Cristalonic solar quartz time computer digital watch, 1976.

Hoover washing machine with wringer, 1948.

Working on the East Coast Main Line overhead power lines, c.1989.

Casio digital quartz wristwatch, model PRT-40E, 1998.

Model gun-boring machine.

Model gun-boring machine.

Steam mains, Wairakei geothermal power station, New Zealand, 1993.

Steam mains, Wairakei geothermal power station, New Zealand, 1993.

Synchronous mains electric clock of the self-starting type, c 1934.