CHEVALIER, DEROGY, DARLOT, FLAMMARION? LENS HAS KNIGHT ENGRAVING COVERS 2X3

The knight engraving suggests that this lens is made by Chevalier or Flammarion.

The lens is in good condition. The barrel shows some signs of prior use. It shows some scuff marks and scratches on the barrel. The elements are in good condition. Shows no cleaning marks, very very slight haze, no fungus, no separation, no scratches, no scuff marks. Some dust particles in between the elements. Lens diameter is 26mm, height is 21mm. Lens has an aperture that opens and closes smoothly. Comes without caps. Comes with the flange shown, diameter is 55mm.