If you can find the attachment online at a parts supply store, they will usually list all models that the attachment will fit.
One of the determining factors of whether attachments will fit is the shank size of the machine. If both machines are short shank, for example, often the attachments will fit. Here is a website that lists shank types and machines:
http://www.clotilde.com/pages/shank_chart2.html
According to this, the Futura is a slant shank machine. I doubt that the 752 is a slant shank; a low shank is a much more common shank type. So, my best guess is that the attachment would not be compatible.
Here's a website you could use to measure a foot from the 752 to see what type of shank it is:
http://www.clotilde.com/pages/which_foot.html