Hi All,
I have a lens in a brass casing, the only marks that I can find is as per picture, the picture shows all the parts and the assembled lens, I think it is a Petzval lens.
The assembled item measures 9cm across, fully extended the height is 20cm. The weight of this object is 1.250kg
I can not detect any markings on the lens itself to identify it.
I would be grateful for any help.