AG Augen USA LC Lensco AL Aire-O-Lite NK Nikon AO American Optical PI Polycore, Inc. AP Apexx Optical, USA PY Polylens AR Signet Armorlite RD Rodenstock AS Asahi RO Rochester Optical Mfg. Co. BR Bristol C and D SA Sola Optical USA CO Conant Optical SC Shore Lens CT...

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