This Schneider 6″ f9 Apochromatic LD Artar lens, #23, is in excellent condition with only faint handling wear. I rate it cosmetically at (9+) condition. These lenses were special “Low Distortion”, ultra high resolution lenses and are quite rare. When these were new, they were listed at about 4x the price of a standard Apo Artar in the same focal length. This will cover 4×5, but would be fabulous on a medium format bellows.