without checking my books at home, I think the production dates are something like '58 to '62ish. Produced in a wide variety of mechanical configurations. Faema products around this time were not very consistent in terms of design. You might be lucky to find two machines built exactly the same

.
One thing to be mindful of is that some presidents had an very unusual boiler. Here's an active auction in Austria as an example:
http://cgi.ebay.de/ws/eBayISAPI.d...&item=140182619432
This kind of thing would be very challenging to restore. No boiler bits etc are available new.
Personally, I would look out for a machine with a conventional boiler (eg, other presidents, lambro, urania etc)