...Tokheim (left) has a much larger cylinder, and is notably taller than the Bennett visi (right)...also, the hose connects to the center of the bottom casting on the Tokheim visi, whereas the hose attaches at an angle on the bottom casting of the Bennett...I believe Erie also used the Tokheim visi...National had their own style visis, that are similar, with octagonal top and bottom castings/dome...
...but, as I said - a very nice piece no matter the make of pump on which it was originally used
...if your visi was a National, I'd be all over it - as I need one to complete a pump!