Turtle shell, 1851-1930.

Preparing an aero engine for display, 1980s.

Lobster carapace, or upper shell, 2001.

Box of pool balls, 1999.

Turtle amulet, Plains Indians, USA and Canada, 1880-1920.

Tortoiseshell, 20th century, and snuff box, early 19th century.

Near Stalybridge no 2 signal box (Horwich, HOR_ST_7).

Stalybridge no 2 signal box (Horwich, HOR_ST_2).

Stalybridge no 2 signal box (Horwich, HOR_ST_5).

Inro, Japanese.

Golden Shuttle at King's Cross station, 1938.

'How a WC works' display, Science Museum, c 1997.