These things used to account for a lot of the 35mm E6 when I worked in a lab, but that was more than twenty years ago of course. Local graphics-agencies would send taxis round with bags of film most days and then supply the results to their business customers. Prior to that there were various painful options involving lith film and gel filters.
I'm curious about software and drivers (for Win 3,1 ?), as well as the motor-drive camera-body which fitted on the unit - is it rather worn out, or still trust-able ?