Made in Rudolstadt, Germany, circa 1900. 

Wooden box with printed paper labels and stone blocks.

In original condition, weak wooden box, and with minor wear consistent with age and use in the blocks, preserving a beautiful patina. 

Anchor stone pieces originally were and are still made of a mixture of quartz sand, chalk, and linseed oil, precisely pressed in molds so that they fit together perfectly. The stones come in three colors in imitation of the red brick, tan limestone, and blue slate of European buildings.