I'd suggest researching the Madoura Pottery Factory , gerspee !
Pablo Picasso made several thousand(s) of objects there , in between 1947 - through 1971 (including tile & .... believe it or not .... ashtrays , to name a couple) .
I have seen a couple of Mr. Ps' ceramic tiles , which were signed on the back , as in the image below .
Can't say I've seen one from him like yours , but am by no means the ultimate authority on all the objects made there by him !