Universal cubical sundial, German, c 1780.

Mantelpiece clock, 1874.

Gold pocket watch and chain, c 1768.

Preliminary sketches of Smeaton's Eddystone lighthouse, c 1756.

Ivory diptych sundial, 1700.

Pocket watch belonging to J C Lettsom. 1774-1802.

Nokia mobile phone with Bluetooth, 2004.

pH meter, 1950-1970.

Pocket altazimuth compass-clinometer, 1871-1893.

Mechanical equinoctial sundial, French, c 1800.

Mechanical digital wristwatch, c 1932.

Sony Ericsson T610 mobile 'phone, 2003.