Thanks fellows; jmoore, a close up pic of your bolt handle could be interesting. Try to see if the flat side profile (better if seen from above) is uniform or "angled" from the ball to the root.
If you're interested, here is the link of Euroarms, the Italianicon Company that bought the entire Navy's rifles surplus:

Euroarms - Enfield Rifles FROM ITALIAN NAVY

On the left column you'll find the text in English. I think they sell also abroad, but the prices (at least for your lucky standard) aren't popular.