MOVEMENT : Signed 'John Long, London'. Very finely engraved balance cock and four Egyptian pillars.
MOVEMENT SIZE : 9.3 mm between the plates. Top plate 38.6 mm. Dial plate 40 mm.
MOVEMENT CONDITION : Complete and running.
There are a number of makers by this name listed in London, but this is probably the maker listed in the Clockmakers' Company between 1698 and 1725.