Museum Piece

I saw these in the Laing Art Gallery, in a cabinet of pottery made in the north east, they are by C.T. Maling and Sons.  
I snapped them because I have the same mug at home. It's the first time I've seen something I have in a museum, although sadly, it's not valuable. I bought mine in a charity shop a few years ago, for the sake of the Newcastle coat of arms on the back.