When I first saw this stamp (a Persian from the 1886 series that was prepared for official use and then used for regular postage) I thought it was a forgery. But then I got thinking, why would anyone forge a stamp with the wrong value on it. It seems a little like forging a $30 bill. Unless I am wrong, I thought the 8 cent surcharge was for the 50 cent stamp, but here it appears on a 5 cent stamp. What am I missing.