Here is another great Sprinigbok Puzzle with 500 Interlocking pieces. The puzzle is 20 inches in diameter once assembled. The number is: PZL2463
This puzzle is from the "Treasures of the Steamboat Arabia Series" and 1st in a series titled: BUTTONS. Arabia Steamboat Museum, Kansas City, Missouri
The puzzle is in very nice condition for its age with no wear to the pieces and and just a bit of shelf wear to the box.