Hi,
Welcome to the Forum.
I've adjusted your user name.
The Italian Registration No.: 615 FI was issued to Fratelli Lisi e Figli snc of Firenze in February 1976, although they appear to have in business since 1950, perhaps working under another Registration number.
I'll add further details a little later to this topic:
Italian Silverware and Jewellery ManufacturersTrev.