Zeiss AX10 microscope trinocular body with a constant 30-70 light split. The Zeiss product number is 42-55-01 and included is a 42-53-08 Tube lens 1.0X M38x0.5 Axio Imager. This optical body is in pristine condition and the binoc tubes move effortlessly as well as the push pull shutter rod. In the 2012 Zeiss catalog, the 42-55-01 was listed at $1,638.00 and the 42-53-08 at $364.00 for a total of $2,002.00. Thanks for looking!