Music - Secret Wooden Puzzle Box

The object is to open the box. Can you find the way to open the box?
Made in Poland out of Linden wood from the Tatra Mountains. Each beautiful box is unique and finely crafted and painted by hand, and gives it a unique character often lost in mass-produced products. An insert explaining the origin of the wood and artisans is included with each box.
Keep memorabilia, love letters, or little heirlooms inside, where smooth-sanded wood walls and bottom will gently hold your belongings.
Great as a gift given, can hold a credit card / gift card, money, jewelry, and much more.