Quadro is a six piece packing puzzle designed and made by Yavuz Demirhan of Turkey.
There is a box with an acrylic window on top. Through the opening you must try and fit all six pieces within the box. This is a moderately challenging puzzle that is suitable for all levels.
A nice well made puzzle that is very approachable.
It measures 7 x 5.5 x 4cm and is made from Wenge, Ash, Sapelli and Acrylic.