The mug I’m used to drink my coffee from has the same size and shape but its color is white. The under-side of the cup has sap green letters: “Thomas | rosenthal group | GERMANY | Λ”.
At the bottom of mine, it has a mustache!
A mustache ? … Purchased by a glocal mugger ? … That takes the biscuit, can’t suppress to hackney LOL cause it’s what I would’ve guessed !
My cup is a designed porcelain with a registered trademark. Look at my new post:
► underside of my coffee cup with a trademark.
