Model, scale 1:48, of a water powered Astronomical Clock-Tower, Science Museum, South Kensington, London, England, 1965. The original was built on the initiative of Su Song in 1088 and described in print in 1172. Model of a Chinese Astronomical Clock-Tower, 1965 1965
Plaster cast of early Egyptian water clock or 'clepsydra' from original dating from between 1415-1380 BCE, reign of Amenhotep III, found at Karnak Temple in 1904. Egyptian Water Clock 1922
Working model of a drum water-clock, with canopy and separate metal part, unsigned, 1955-1965 Working model of a drum water-clock, 1955-1965 1955-1965
Falling-drum water clock "worn and portions missing", c1700 Drum type water clock, about 1700. 1690-1710