Such signatures are much in demand by collectors who are looking for pieces with working mechanisms, original gilding, good chiselling and also some prestigious provenance.
A good 19th Century clock (of the reigns of Louis-Philippe or Napoleon 3rd) can be found at US $ 900. It might be in a wood or marble case. Clocks from the 18th Century or from the 1800-1820 period are much more expensive (between US $ 3,000 and 5,000 for average quality pieces).
Prices for clocks from the beginning of the 18th Century range between US $ 4,000 and 10,000 while Louis XIV cartels are worth between US $ 7,000 and 20,000. 18th Century models decorated with elephants, exotic subjects or satyrs are found between US $ 15,000 and 50,000 while bronze Rococo Louis XV models and 18th Century skeleton clocks are somewhat rare (between US $ 20,000 and 75,000).
«A very important striking gilt bronze
and tortoiseshell cartel clock
with its base by Viger,
Louis XV period (Value : US $ 50,000-70,000)»
«An important Charles X highly complicated long duration
astronomical striking skeleton
clock with equation of time
by Jean-François Henri Motel (1786-1859)
who was a pupil of Louis Berthoud.
Motel only made a few clocks.
(Value US $ 70,000-100,000)»