Mid Century Pottery Tiles on Slate-like Tile~Villeroy Boch?~Sgnd CBB

Hello Again,
I bought these at an estate sale a couple of weeks back. They're beautiful!!!
They have all the look of mid century pieces.
Each raised pottery tile is mounted on what looks like slate, but I guess it's slate black tile. On the back they're both initialed VB,.....I think that may be for Villeroy & Boch.
Both carved pottery tiles are signed " CBB ". I thought that they'd be easy to research,.....but I haven't had any luck at all.
I'd welcome any information, looks, or loves.

love to all,
Tony.