Super Heavy GERMAN Antique Pewter Steins - Beer, Wine, & Shot

I got these steins from a friend who is in her 70s. Her mother gave them to her in the 50s, (when they lived in Germany) and her mom received them from an old man in Germany. They are super heavy, and made out of pewter. The large one is a beer mug/stein, the medium one is a wine mug/stein, and the small one is a shot mug/stein. If anyone has any information on these, it would be greatly appreciated! I can't find anything like these online.