Vintage Steel case money wallet with Bank of England motif

This is not my usual purchase but it was so odd. I have never seen one before. It has some yellowing on parts of the cover. Its not rust and may be what's left of some varnish. The wallte is bowed too, as if its been in a hip pocket. I liked it fo its curio value. Does anybody know anything about these? I wasn't even sure where to list it so if I have it in the wrong place , please let me know.