NO ADAPTORS PLEASE. If you buy it...have someone with suitable qualifications change over both the flex and the plug to correct type for use here, especially as I would expect the flex to be geriatric. In fact the whole of the wiring (such as it is) may have to be addressed, subject to inspection.
For the rest of it, hard to know as it depends on the individual model and how old it is in terms of whether there is anything electrical under the bonnet besides the element. The element would be ok (subject to whether it is serviceable or faulty straight up) and will simply run hotter pulling more amps/watts than it would on 220, and it is hard to know how long it would last (how long is a piece of string), but anything else electrical in there may not fare too well due to our higher voltage and resulting higher amps and would need to be changed out....ie if there were any solenoid valves or auto level boxes I dont expect they would last very long here before blowing... Also I wonder what kind of boiler pressure regulating device there is. If its an old mercury switch there isnt anything wrong with that EXCEPT that its wiring could be well and truly cooked.....All subject to inspection.
Buyer beware doing this sort of thing. I would start by budgeting (in my costings to see if its a worthwhile project for me) to change out everything electrical and replace with proper spec current stuff. That is of course in addition to costing up a mechanical and aesthetic restoration. All these costs, added to the invoice as well as total actual cost of import, is the real cost of buying the machine.
Sometimes, it isnt worth it as I am sure you will find your Italian broker is not working for nothing and does not go under the pseudonym of "mr nice guy"/.....he is making a living.
You might also consider, that not everything in coffee machines that is old, is "desireable" or has any value. Sometimes, they are just "old", and old doesnt mean vintage or collectable, it just means old.
Eyes wide open please.
Hope that helps.