Those numbers you have read somewhere are complete nonsnsense.
F.P.J employs around 25 watchmakers total. They make EVERY watch, including the Elegante. Production is running on max capacity and will not be increased. Number of pieces will vary a little each year, accoding the the specific models being made.
In 2018 - the number of MECHANICAL watches was 626 pieces. The number of Elegante I dont know exactly, but my best guess is no more than - / + 200 pieces. I will look in to it more precisely. FPJ are quite open about numbers, so if you ask at the FPJ boutique they should be able to give you the right one.
hope this helps.