Tritschler (G.m.b.H) & Cie. (K.G.)
Marktplatz 7, Königstraße 44, Stuttgart, Württemberg (now Baden Württemberg)
Haushaltswaren / Household goods
Known dates: Founded in 1723 and still trading today.
Purchased steins from: Villeroy & Boch - Mettlach
References: youtube
Villeroy & Boch - Mettlach #1909 Stuttgarter Bürgerhalle, owned by Aktienbrauerei, founded by Ernst Wulle 
Two ink stamps on the featured stein: 1. Tritschler & Cie. 2. Villeroy & Boch - Mettlach, mercury mark, date unknown. Impressed #1909. 