We have found that by adding seven exclusion parameters to the search query, the pre-sandbox results are displayed. Remember the Florida update? If not see these three links, 1 - 2 - 3. The same deal applied then, at a certain period in time, you were able to use the syntax -sssss -sssss (two exclusion parameters) to see the pre-florida update.
In this case, you can use the keyword phrase followed by 7 exclusion parameters to find the pre-sandbox results. This information is a step in the right direction. My own personal example is a client who used to rank well for a non-competitive keyword phrase Negative Pressure Isolation Rooms and no longer ranks number one. This is an example of a new site that was put into this "sandbox". But by doing a search on Negative Pressure Isolation Rooms -dfsdgsdsd -sdfgsdgsdfg -sdfgsdgsdg -sdfgsdfgsdfg -dsfgsdgsdg -sdfgsdfgsdfg -sdgsdfgdsfg it brings up the pre-'sandboxed' results with the site airmontinc.com ranking number one.
Thanks to cre8asite for the information.