More than likely they’re off ‘badge engineered’ safes typical of that period- ie; someone else’s safe with someone else’s name stuck on it. The company my father worked for in the late 1950s used to get them from one of the bigger manufacturers of the cheaper stuff- Samuel Withers if I remember right. They’d get the name plates cast with whatever the retailer wanted on them and for as low a run as 5 or 6 safes- it didn’t have to be huge quantities.
I’ve seen loads of obscure ‘oldies’ but have never seen the name Foulaz either, so more than likely it’s a company name or retailer rather than an actual manufacturer but it would be great to find out otherwise 🙁nerd):
They’re nice plates anyway and something a bit different from the thousands of Milners etc that are out there 🙁happy):
