The number 23
Thank you. The production number is definitely higher than 23. The fellow who sent the information to you implying the number "23" has contacted me. The funny thing is that he sent you my listing from perhaps last year? When a listing is shared and reviewed it is always important to try to understand the context. I do not consider many of my lists to be complete. Certainly not the Abarth listings! They reflect what is known today about cars that can be identified by chassis number or some other very distinctive characteristic. Oftentimes, there were many others that are simply not yet described by number.
In this case, I will not be surprised if the actual 1600 production number turns out to be 40 or 50 or more. Implications are certainly strong that there were more than 25 built and I would tend to think, "at least thirty". The listing is definitely not complete! And, your car is already on my list now, but I would still like very much to learn the Allemano body number. It might be very simple to find as the number is often stamped on the seat rails and it takes only moving the seat very far forward (or back) or sometimes off the rail in order to see it ... if it is there. Otherwise, there are other places to look.
All the best,