John, the 1906 date engraved on the lid is a pretty good sign of the age of the stein. If there is a number on the bottom it might help one determine what maker used the transfer on the blank body.

It’s unlikely that you will find a number on the bottom or that the manufacturer can be identified, because the majority of porcelain firms did not mark their steins. It’s common for steins of this type to have a lithophane in the base. You can check by holding the base of the stein toward a light source and looking through the inside at the bottom. There’s an article about lithophanes in the Reading area of this site.

Maximilian von Holnstein was an important and interesting person, but he died in 1895. The engraving on the lid suggests that the stein was owned by his successor as Graf, most likely given as a Christmas gift. This inscription makes a relatively “common” stein more interesting, but does little to increase its value.

Agreed. It’s surprising how much historical info can be pulled out of these steins if we look hard enough.