NIKON motorized nosepiece,BD,M26.for four objectives. Excellent condition

Description

For sale is a NIKON motorized nosepiece,BD,M26. For four objectives. Excellent condition. Probably for Nikon Optistation.Not sure. As seen in the picture,the turret is fit for Brightfield and Epi illumination
The nosepiece was tested and it is in excellent mechanical and electrical condition.
The nosepiece accepts M26 threaded objectives [Nikon BD Plan,etc.] but it attaches to a microscope via a 42mm flange. That is the Olympus and the Zeiss standard.
Both cables service the photoelectric cell, and are in excellent condition. One cable is marked :REV EXT TO J7 , 70209530010. The second cable is marked: REV EXT TO J6, 70209530000.
Both cables go to the photo cell. The motor for this nosepiece is external,it is attached to the microscope and acts the nosepiece via some gear. The nosepiece itself has the gear to connect to the external motor.
The unit weighs 990g.