This is a scan of a postcard from the National Gallery of Australia. It has to do with some knitting exhibition at the National Gallery of Australia.
(https://www.actbus.net/forum/proxy.php?request=http%3A%2F%2Fi550.photobucket.com%2Falbums%2Fii421%2FJulianHamstead%2FIMG-1.jpg&hash=6e8ca0f63b18a78a71fe349e2031389b8f2efa3d)
More of these are free & available from the shops with the free postcard stands.
I found the description on the back of the postcard
"Knitta Please* covered an entire bus in wool at Plaza Luis Cabrera in Mexico City in 2008"
*Founded in 2005 in Austin, Texas, Knitta Please is a tag crew of knitters who turned their frustration with their half-finished knitting projects into a phenomenon sweeping across the world.