This is a first SPSS pendant. It is smaller but much more precious than the 9 window pendants offered. It resembles a special dissection of a square. It is a so called simple perfect squared square (SPSS).
How to dissect a square into smaller squares? You may think: "Take 4, 9, 16 and so on smaller squares and that's it." - OK, but what if there must not be two equal sized smaller squares?
Please refer to www.squaring.net for detailed information. Note that this is number 1 of 9 "nice" pendants available.