Vintage Beck London brass lens F= 12 inch (300mm). Total height: 87mm. Front lens diameter: 41mm. Screw thread diameter: 54mm. 
Good cosmetic condition. Presence of some traces of wear. Lens without haze, without fungus, without peeling. Presence of a few micro cleaning scratches without impact on the image.  
Antiq-Photo establishment
Vintage Beck London brass lens F= 12 inch (300mm). Total height: 87mm. Front lens diameter: 41mm. Screw thread diameter: 54mm.  Good cosmetic condition. Presence of some traces of wear. Lens without haze, without fungus, without peeling. Presence of a few micro cleaning scratches without impact on the image.