Nice tile, it might be an old school British tile.
Get in touch with these guys, they are experts in old school British ceramics.
https://dominiontiles.business.site/
you can also try to find something similar to that, you might be able to find a close match. Try that warehouse in Edmonton see what he says, he is very knowledgeable.
is it British tile or import?
Try this guy he runs a discontinued tile warehouse in Edmonton London.
I used to go over there to match tiles while I was in London. Hope it helps. Good Luck!
[email protected]