With the help from a friend in Holland, I now know that it was made by Gerver Imetex in the early 1970's
but they do not have any information on it unfortunately.
My only hope is to get a message posted on Dutch engineering forums for more info.
I need to know the mechanical action for the rear roller. This can be raised around 20mm at each end with a screw in handle , but there does not seem to be any way of keeping it in that position once the handle is released.
The purpose of this must be to do with rolling cone shaped items.
Mike.