Robert Melly

Hello
These watches 1820s? Duplex escapement Geneva








Here is the photo stamps maybe it will prompt in the dating of these watches

Beautiful Watch too.  
You begin to have a nice collection  
I don't see really the duplex escapement, on this Watch, I just distinguished

Melly frères (brothers) in Paris on a clock Louis XVI
ROUZIER and MELLY in Paris, on a Watch XVIIIème
Clockmaker genevois in RODEZ, 1763

Hi Franck272, many thanks!
Sent me this information - Robert Melly worked 1800-1844

What is this book, I do not know ?
Can you give me those references ?
thank you

Hello Franck272
I can not say the name of this book. This information was sent to me on the forum, I wrote my question but the answer has not yet received