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CARL ZEISS COMPENS 12 EYEPIECE LENS MICROSCOPE PART AS PICTURED R2-A-42 American Optical Co. img{max-width:100%}WILD HEERBRUGG SWISS M20 BRASSCARL ZEISS COMPENS 12 EYEPIECE LENS MICROSCOPE PART AS PICTURED R2 A 42 THANKS.