F. Ad. Richter & Co., Germany, early 1900's.
(cardboard box 3.2" x 4.3" x 9/16", 9 stone pieces, and booklet;
the Anchor Puzzle Book dates this puzzle as first made in 1917;
similar in construction to the Anchor Puzzle Tangram;
the inside of the cover shows how to pack the pieces into the box;
booklet has multi-language text inside covers and on pages I to XIX at front,
where none of the text is in English,
followed by a blank page where a previous owner has drawn
a solution to the additional shape shown above,
followed by 32 pages with 97 shapes to make)