ANTIQUE LENS 4x5' app. 100mm LARGE FORMAT DUPLOUICH DEROGY,HERMAGIS KRAUSS?

Tested on a 5x7 camera and showed complete coverage, but it is dark and bit difficult to see. 4x5' for sure Comes into focus, full open, at infinity approx. 100mm. Really difficult to see. APPROX 100MM. Don’t pin my down on it. Has a 90 or 100 degrees coverage.

The lens is in good condition. The barrel of the lens shows moderate signs of prior use. It shows some scuff marks and scratches on the barrel. The elements are in good condition. Shows no cleaning mark, no haze, no fungus, no separation, no scratches, no scuffs. No dust particles in between the elements. Disc aperture rotates as it should. Lens comes without caps. Has a 23mm diameter just above the disc aperture and a 20mm height. Flange has a 65mm diameter.