Hey Repechage. Just in case you're still checking. I did speak to Jim Allen about a month ago. Nice guy. He did say that my bike was made and painted in Italy. This appears to be a pre-production bike. I would like to keep/restore the original parts but also upgrade a few others for both aesthetics and riding quality.
Here's what I've done so far. Changed out bar tape, bought Modolo hoods (had none previously) , replaced the old Super Corsa saddle with a NOS replacement, replaced Shimano RX-100 rear derailleur with a Sachs-Huret New Success derailleur. The original intent was to replace it with the original Edco (Spidel) SLJ 6600 rear derailleur but apparently these are sought after and can be quite costly. So I opted with the Sachs which later was used by Edco as a rear derailleur in the late 80's/early 90's. Not quite period-correct but better than the lower end Shimano RX-100. Hope you like.