Probably a Dallmeyer 3B but only marked Dallmeyer London 12170 and no adjustment for Soft...

The Dallmeyer 3B is a brass lens with a focal length of about 292mm and...

Small dallmeyer 3 1/4 inch f/6.8 wide angle anastigmat that comes with flange. Optics in...

early 1 inch ( 25mm) C mount lens from Dallmeyer with a f/1.9 aperture. Small...

Beautiful Large and Heavy Dallmeyer 4B Patent, Petzval relative lens. Made around the 1870s and...