Richter Anchor Stone Puzzle No. 26

F. Ad. Richter & Co., Germany, early 1900's.
(cardboard box 2.25" x 4.25" x 1/2", 7 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;
the booklet has English text on the inside of the covers shown above,
and 32 pages with 99 shapes to make,
where the first is the rectangle for the box packing
and next three are the parallelogram, square, and triangle shown above)