Dobbies Garden World
Edinburgh, Scotland, EH18 1AZ
One penny stamped with a Butterfly Fifty Pence for coin. Electronic. In entrance lobby of gift shop (separate building, to the right of the main entrance.
Update Jan 7 2013 Exactly three years to the date that I was here last, the machine is still working fine. It has been changed to a pound coin machine instead of 50 pence. -TM