Dallmeyer Super-Six Projection Anastigmat 2" 50mm f/1.9 Dallcoated lens, adapted to Leica M mount with rangefinder coupling. This is the same exact optical lens design as a regular Dallmeyer Super-Six, only without aperture blades, so you always shoot wide open.
The glass is in great condition, almost mint with no scratches or cleaning marks, just a faintest hazy ring around the edge on the front, no internal haze, fungus or separation, practically no dust.
The focusing ring rotates easily and smoothly. The rangefinder coupling has been calibrated and is accurate. The distance markings are not correct, except at the infinity. The closest focus distance is about 70cm.
Cosmetically it looks excellent with no scratches or dents, with few small spots of paint wear. The front nameplate ring shows irregular spacing between some letters due to a factory printing defect, making this lens unique.
It comes with two caps and the original factory packaging for the lens block with a matching serial number.