I always read with interest the responses about identification of old Petzval lenses.
Many of them have no inscriptions, and many small workshops made them, so a correct identification is not easy.

IF some of the "sauvants" out there are willing to help, i propose that those interested could post here the pictures of their unidentified Petzvals, asking for some help about the identification of their lenses. I guess that a few pictures of the "naked" lens (i.e. with its innards exposed) would be of great help in the identification of the maker, or at least of the approximate age of production.

It would be a nice quiz for Christmas vacation
I have identified only one of my Petzvals, with the help of some experienced forum user. All the others are of unknown maker.
I'll post the pictures of a couple of them, if somebody volunteers for help.

cheers

CJ