This 1783 Italian states 1/2 soldo was listed by the shop as from Sardinia. I can't find any such coin on Numista except under Savoy. My 1700s Krause catalog (2010) has entries for both Sardinia and Savoy, but has what appears to be this coin under Sardinia. I believe Victorio Amadeo III was both Duke of Savoy and King of Sardinia, so I'm not sure which state the coin should be properly listed under. Any suggestions?
My suggestion would be to use the description of the European auction houses on acsearch.info. They go with Savoy. Scrolling through its listings I found( Editions V Gadoury,Auction2018,Lot1693) a 1783 with listed references . Sardinia and Savoy overlap and you could correctly label it a number of ways. Eklund ,Craig, and Krause all did.