The confirmation that the ladle is definitely solid silver is very important.
Since 1832 in Tuscany there was no binding legislation, in fact with motu proprio of July 21, 1832, the Grand Duke makes the warranty punching optional, with the following mark, which, as you can see, is stylistically very similar to yours.
The letters changed from city to city: F for Florence, S for Siena, L for Lucca ..... etc.
These marks could be punched, if required, only for the unique certifiable title, ie 9 ounces and 12 deniers per pound, equal to 792 thousandths. All works different fineness, both national and foreign, could not be legally punched in any way but circulated freely within the borders of the Grand Duchy according to "... the pleasure and the choice of the buyers whose diligence will be due to verify the intrinsic value and fineness
Also, after the annexation of the Grand Duchy of Tuscany to the Kingdom of Italy, and until 1935 it was not mandatory to affix warranty marks on the silver artifacts, but surely everyone could put his own trademark.
In a situation like this it is difficult to say whether that mark was the trademark of Pastorini or something else.
As I said the thing is very interesting and I wrote to the most famous authors of books on the Tuscan silver to have a comparison.
It will be my care to publish any news that I can find.
P.S. I think the animal is a panther