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ANTIQUE BRASS SLIT ADJUST UNKNOWN RARE COLLIMATOR SCOPE PART AS PICTURE Z4-B-94 PCB Piezotronics img{max-width:100%}ANTIQUE BRASS POLARIZER EYEPIECE BECKANTIQUE BRASS SLIT ADJUST UNKNOWN RARE COLLIMATOR SCOPE PART AS PICTURE Z4 B 94 AS PICTURED. THANKS.