This is the most common form of Strike Doubling. I catigorized other forms such as slide, etc. back in the 1990s and presented it again in my Coin World column years later. I think Mike Diamond has duplicated all the info and put it in the Internet somewhere so it should be able to be found.


Edited by koinpro
07/19/2017 10:46 pm
07/19/2017 10:46 pm






















