A travel sundial, Butterfield, Paris, 18th century,

Michael Butterfield (1635-1724) was a British clockmaker who moved to Paris about 1663. He worked at the royal court was appointed engineer to the King Louis XIV. He opened a shop selling precision instruments in 1677 in rue Neuve-des-Fossés, in Saint-Germain. He sold all types of sundial, but dominated the market for the small travelling dial with the adjustable gnomonwith bird motif and three chapter rings. This type of dial became fashionable and called the Butterfield dial.