Here is a picture of something I have never seen before, a Google Stencil. Kuba Zerdzick posted a picture of one on his Flickr gallery. He took the picture on March 10, 2011 in Poznan, Poland.
I think the picture may have been taken in one of the Google Poland offices but I am not a 100% sure. I do know it was taken on an HTC Desire HD device running Google Android.
