Oliver,
As you know I am not real up to speed on firearms, but I did go to what general resources I have. In 'Gyngell' p.106 is this illustration of a marking configuration which seems to correspond to what you describe.
It does not have the rampant lion, and of course the 'stacked' in three name abbreviation does not match, but checking in Gardner ("Small Arms Makers", p.325, URQUIOLA is listed 1680-1714 in Madrid; then again in Madrid 1815-31.
While the makers name does not match, and the rampant lion is absent, I thought perhaps this marking convention might indicate at least possible Madrid manufacture. While Spanish type markings, the 'ANO' suffix does sound Italian. Not impossible that an Italian gunsmith might be there and use similar marking techniques. The absence of the lion may suggest subordinate to makers with royal contract ? or some such administrative situation .
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