Secret Opening Box - Button Bank

Solve the puzzle to unlock the box. 

This is a well made wooden puzzle box.  It has a coin slot on the side so that you can place money on the inside and keep it safe.  Each Secret Box has a different solution to it.  You will need to be thinking outside the box to open these well made puzzles.

From Wei Zhang and Peter Rasmussen who are part of the Classical Chinese Puzzle Project:

"We’ve been collecting and researching the histories of Chinese puzzles since 1997. Occasionally we came across a box—around the size of a shoe box—that required an ingenious trick to open it. No two boxes were exactly alike, and some required a number of steps to open. Whenever we asked about the origin of these boxes, the reply was always the same: they came from Shanxi province. We began traveling around Shanxi in 1999 and found many more of these clever boxes in small rural markets. The boxes had been used by families with property to hold deeds and other valuables. One has an inscription dated “31st year of the Guangxu reign" (1905), proving that their use goes back more than 100 years. Today people enjoy the challenge of opening the boxes as puzzles rather than using them to hold their treasures.
These four puzzle boxes are based on antique treasure boxes found in China. Each has a different secret to opening it."