Richter & Co, Germany, is famous for its many late 19th/early 20th century sets of stone blocks, including very large sets made for constructing elaborate structures. This tangram "Anchor Puzzle" is the simplest among them, and my favorite--in no small part for the booklet accompanying it, showing 176 different designs to be made with the blocks, and which I find just gorgeous. (I think they pages are lithographed, but they look almost like woodblock prints to me, formally just really lovely--and here a one time owner numbered the shapes in pencil, perhaps as they completed each one.) Among the most ancient puzzles, with Richter's version quite an iconic one.
Box measures 3 1/8" x 3 1/8" x 11/16". One short side of box top lost, tear to the front page of booklet, and first couple inside pages of booklet (text pages) loose. Blocks and design pages of booklet in very good condition.