Could it be the EA53 prototype ? If it is, I have it from 1961, so I'm a bit puzzled...
Yes, it is one of the EA53 prototypes.
I actually had it as from 1964, which seemed believable as it is clearly a prototype for the Type 3 1600 TL Fastback, which I seem to recall dates from soon after.
The same picture does actually feature elsewhere on the 'Net captioned as 1961 and indeed 1954!
You may well be right that it's from 1961; perhaps a VW prototype expert (Wendax?!) can confirm or otherwise?
In the meantime will give you a point and call it solved.
Unmodified puzzle photo: