17th-19th century. Note: dating Tibetan religious objects is every difficult as there was virtually no distinction over the centuries due to isolation. Even museums use this broad span dating. This example silver with fine repousse work throughout the cylindrical drum. Motifs include calligraphy mixed with formalized foliage and include three colored "stones" in tall bezels. A chained weight spins the chamber when shaken. Inside, a fine prayer roll of tissue thin paper easily hundreds of feet long, probably older. Each rotation of the wheel generates every prayer said once, thus the output of this example is enormous. Turned wood handle. 10 3/4" total length.