Ithaca Double information.

[Larryjk]

I have been doing a lot of work on Ithaca doubles. After looking at a site on serial numbers I find there are several models of Ithaca doubles. But I haven't been able to find a reference that appears to be able to define the differences between models. For example, what is a "fleues" model and how is it different than the others? There seems to be great store in owning a fleues model Ithaca. Let me know if you find a good reference book.