This is a Lewis and Clark World's Fair 1905 Souvenir Stein / Mug.
It is 4 7/8" tall, 2 3/8" around the top opening and 3" across the bottom. It is marked " J W R " on the bottom and is made in Germany, even though it is not marked. It is marked around the Stein, near the bottom " The Lewis & Clark Centennial - Portland - Oregon - 1905 - ".
It has Scene in panels around the Stein:
1. The Fair Logo of Lewis & Clark & Sacajawea
2. & 5. A Winged Angel with her arm straight up on either side of the Fair Logo
3. Portrait of WM Clark
4. Portrait of Meriwether Lewis.