Dog full of money

An interesting installation of street art I spotted today at the junction of Caledonian road and Pentonville road in Kings Cross in London...a well used commercial scale microwave (the kind found in restaurant kitchens) with a small, black and white sticker bearing a simple line drawing of a dog with no forelegs and the text "Dog full of money"...Google helped (a bit)...I quote - "DFM are those dogs you see outside shops that people put coins in. They are the best thing ever. We need to promote them for the good of humanity." so, an obscure viral marketing campaign for the charity "Guide Dogs for the blind" perhaps? ;)

A little extra digging found a more likely source, some well travelled students...