large studio bowl

This very large 14"wide x 6.5 high studio bowl was found for £1...!
I love the greeny brown glaze with an interned top rim in dark brown , i think i could be a large fruit bowl or mixing bowl (but would be a great sangria/punch bowl) lol!! ;-)))
its made with a light grey clay, a very well made piece , it has a mark on the base which is small and hard to read or photo but the letter I can make out is either "LZ" or "ZT" or "LL" depends which way you look at it!!