I have just acquired 7 Apochromat Red Dot Artar C. P. Goerz AM OPT CO Lenses from a liquidation estate sale, the gentleman owned a graphic arts business years ago. I know nothing about them I was wondering if anyone would know approximate age or value? I have 47 1/2 IN F:15 /35 IN F:12.5 /30 iN f:12.5 /24 IN F:11 / 2-19 IN F:11 / 16 1/21 F:9.5 These all are mounted on metal boards with measurements. Thanks for any help you can give me.Kathi
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