David Henri Grandjean, 1744 – 1845
Le Locle, Switzerland. Born in 1744, he became a famed maker of automaton watches, but his prowess at making mechanical singing birds elevated him into a class of his own. He made a magician watch which was presented to King Frederick William IV of Prussia in 1842. He died in 1845. His son Henri was born in 1803 and became a famous maker of precision watches and chronometers at the Great Exhibition of 1851 in London, and won a prize. He died in 1879.
Grandjean, David Henri, Le Locle, born 1744, died 1845. A fine maker of automaton watches and mechanical singing birds. (Mosoriak p. 85)