Portal by Dee Dixon

Here is the description from Cubic Dissection: 

Portal is Dee Dixon's newest Sequential Discovery Puzzle Box. Dee's earlier works like Where's My Hammer and Space Case have been very well received by the puzzle community. Portal carries on Dee's tradition of innovation and excellence.

Five Sinatra's review does a great job describing Portal:

"This newest creation moves away from some of Space Case's more blind aspects, providing ample direction and feedback from start to finish while preserving some of the best aspects of such semi-hidden mechanisms. The box's aesthetic shares some similarities with Space Case, featuring shapes on its sides whose possible purpose must be determined. However, its puzzling is quite different and, I think, more playful. Portal features some really cool design details that had me smiling appreciatively after I reached the end and realized the nature of the path he takes us on; the puzzle gives WMH a run for its money..."

*Shipping will be calculated after auction ends.