TWO (2) PERFECTLY MATCHED BRASS ANTIQUE LENSES FOR WET PLATE STEREO CAMERA - FOR MAKING STEREO PHOTOGRAPHS - CIRCA 1870 - 1880. Set of TWO lenses as shown. Each lens have the EXACT SAME focal lengths. Each lens is IDENTICAL and are a perfect matched pair. On threaded end both lenses measure exactly 2" across or 2" Diameter. Both lenses are 3 3/8 long end to end. There are no mounting flanges for the two lenses. Both lenses have dark patina from age, and discoloration. Wear and tarnish is consistent with age and use but overall displays nicely. All original lens elements present. They are part ...