Openable Box by Hideto Satou (S-2)

This box is more of an impossible object than a puzzle box.  The puzzle is to imagine how it works.  

Note also that it is large.  Roughly 6.5"x3.5"x3.5".

Per the Karakuri website:
     Put the box on the table. You can open the drawer, regardless of its side.
     size   90*90*150mm
     material : walnut

The puzzle is located in the United States, but I will ship worldwide.
Customs forms for international shipments will reflect actual payments.
Payments can be made through PayPal (Friends & Family preferred).
Buyer to pay shipping calculated after auction.
Buyer may choose supplemental insurance at their expense.
Please wait for the updated invoice before making payment.