Arcmate Senior! that's got to be one of the first models Fanuc made, let me know the serial numbers on cab & arm (may be the same) and I'll see if Fanuc have any info.
As per my PM to you they are packed in a tight spot with a whole load of other 'projects awaiting time' - to get at serial nmbers I'll have to move about 12 pallets of kit and I've not the space to shift them! It's a bit like that game where one tile is missing and you move the 'space' around to make the other tiles into a picture!!!! It is quite possible I have the original invoice and it will have the s/n - I know I do for the mill and they were bought by the University at the same time - I'll have a hunt tomorrow.