Septfontaine, Luxembourg.
Hersteller / Manufacturer
Known dates: 1767 to the current day.
Founded by Jean-François Boch (I) et Frères in 1767. Merged with Nicolas Villeroy in 1836, to form Villeroy & Boch
Reference: Porcelain Marks & More
Moulded "V&B Luxemburg" on stein #24. Also note circular "Boch Luxembourg" mark, (French spelling). 
Modern mark 
Villeroy & Boch - Luxembourg #24, dated 1860.
"Mercury" Ink stamp. 1874- 1909 
Moulded "V&B Luxemburg" on featured stein #24. Also note circular "Boch Luxembourg" mark, (French spelling).
Printed mark on the base of modern tableware 