~ Trinke fein mit Maaß und Ziel ~
The rhyming message here is to drink in moderation, but if you can't control it, keep your mouth shut and don't complain. The blue/gray, salt-glazed, stoneware stein is marked only "309", ca. late 1800's.
Trinke fein mit Maaß und Ziel, bei Unmaaß profitierst nit viel.	Drink well with moderation and purpose, because without moderation you will profit little.

Translation: Roy De Selms Photo credit: Unknown