These pumps are Wayne 511E, there were Mfg'd in the early 60's. These pumps were originally configured as 8 grade pumps. This can be determined by looking at several things including the Veeder Root computer, as you will notice there price on the lower wheels is only 2 digits plus the tenths, the later computer would have had a digit for the dollar. this can also bee seen since the upper doors are early style that are chrome plated, not the later stainless doors. The original Blend plate would have been yellow at that time, later they went to the SS ones. The face plates appear to be later ones.
I will try and answer any specific questions you may need help with just drop me a note.
Currently I have 6 of these pumps in various stages of restoration, 2 are extremely early 511D pumps...so I should be able to help you out with any questions you may need clarification on...
Mike
