Check the listing for details. Rare German Beer Mug, Vintage Rothenberg Glass Mug W/Pewter Pronlein Emblem. Condition: Used, Made in Germany. Listed at 19.99 USD. The vintage Rothenberg glass beer mug with a pewter pronlein emblem is a collectible piece of drinkware that embodies the theme of breweriana. With its German craftsmanship and unique design, this mug is a must-have for beer enthusiasts and collectors alike. The mug serves as a nostalgic reminder of traditional beer culture and the art of brewing, making it a charming addition to any collection of beer memorabilia. Rare. See photos.The vintage Rothenberg glass beer mug with a pewter pronlein emblem is a collectible piece of drinkware that embodies the theme of breweriana. With its German craftsmanship and unique design, this mug is a must-have for beer enthusiasts and collectors alike. The mug serves as a nostalgic reminder of traditional beer culture and the art of brewing, making it a charming addition to any collection of beer memorabilia. Rare. See photos.