WE BOUGHT A LOT OF MUSIC BOX PARTS AND HERE IS ANOTHER MUSIC BOX MECHANISM. THE NOTES IN THE BOX SAYS ” SET TO GO “. WHEN I MOVE THE LEVER OVER IT RUNS NICE AND SMOOTH. IT HAS A LAST PATENT DATE OF FEB 2 1897. THE BRASS PART MEASURES OUT AROUND 14 3/8″ X 4 3/8″. I TOOK THE BACK PART OFF AND IT LOOKS LIKE A DOUBLE COMB MECHANISM. WHAT YOU SEE IS WHAT I HAVE.