
Artist's Ink stamp on
Villeroy & Boch - Mettlach brewery stein.
Matttighofner Brewery, Mattighofen, Austria.
Brewery dated between 1550 - 1975.
In old German handwriting, e.g. Kurrentschrift, the macron (dash) over the "m" in the above signature, translates as "mm" in modern text; hence "Stockhammer".