French Repeater circ 1820

This is rose gold and with cylinder escapement, 54.5 mm.  It strikes the quarters.  I have been unable to find any markings indicative of the maker or date.  Just wondering if anyone here might recognise any features which could suggest a specific date/maker." />
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Hello, it will be very difficult to find the maker if the watch is not signed.  I think it has been produced around 1820-1850.