Albert Thannhauser

With his half brother Joseph, had a beer stein making business, the Brüder Thannhauser, München or the geBrüder Thannhauser, München. The mark on the lids is often just B.T.M. The family story is that Charlotte Langermann Thannhauser fixed up her sister Lina with her husband's half brother Albert to get more money into the family business from Lina's dowry. Source: Bruedser Thannhauser

According to the Stein Marks web site, it would appear that this business expanded from beer mug lids to assembling the entire stein. In addition to ceramic beer mugs, they also made glass and pewter steins. Family lore is that Oktoberfest allowed 10% larger steins than the normal liter so Albert, who was a better salesman than a businessman, was sent to the festival to sell these larger steins. Source: [http://www.steinmarks.co.uk/pages/pv.asp?p=stein258