Vintage brass lens, Achromatic. Approximate focal length 265mm. With iris diaphragm. Total height: 52mm. Lens diameter: 47mm. Screw thread diameter: 54mm. 
Good condition. Presence of some detachment on the lens. 
Antiq-Photo establishment
Vintage brass lens, Achromatic. Approximate focal length 265mm. With iris diaphragm. Total height: 52mm. Lens diameter: 47mm. Screw thread diameter: 54mm.  Good condition. Presence of some detachment on the lens.