For Approx Values: Please check below on Ebay for current prices

I found these really interesting mugs the other day (I’ve listed them in the “other / unknown” category even though I have a guess about the maker). I originally picked them up because they have cool black-green abstract designs. One concentrates more on diamond and circle shapes and the other seems to be some sort of flowers. The “green” actually seems to be a halo surrounding the black glaze design - like it sort of spread when fired. I don’t know anything about the manufacturing of pottery so I don’t know if that’s how they got the effect.

The bottom of the mug has a “WP” mark and it says “Made In England”. I think this might stand for Prince William Pottery because I saw some other pieces in auctions with the same mark. But I (they) could be wrong. No idea on when these mugs were made either - I wasn’t able to find that much about Prince William Pottery. What I did find seemed to indicate they made a lot of commemorative pieces?