original works made in conjunction with Banksy´s preparations for Brit Pop band Blur´s album called "Think Tank".
These works were gifted by Banksy to a helper. The works are accompanied by a signed letter that names the previous owner.
A description of the work, the process with the artist the place and the date in 2003 when it was conceived.

The signed letter goes:

I, Robert got this Think Tank spray back around 2003 when I was on a traveller site in Deptford East London, Creek Rd. I was working preparing walls to be sprayed on by Banksy. There was 3 or 4 made at the time to line up the stencils.
This in the only one one cardboard. The others were on paper.... Signed Robert
(we have the complete name and artist name that identifies the previous owner as a known Banksy helper in the early years.)

Banksy interviewed on the commission:

“I’ve done a few things to pay the bills, and I did the Blur album. It was a good record and [the commission was] quite a lot of money. I think that’s a really important distinction to make. If it’s something you actually believe in, doing something commercial doesn’t turn it to shit just because it’s commercial. Otherwise you’ve got to be a socialist rejecting capitalism altogether, because the idea that you can marry a quality product with a quality visual and be a part of that even though it’s capitalistic is sometimes a contradiction you cant live with. But sometimes it’s pretty symbiotic, like the Blur situation.”