Just thought that I would share. Mad Die Clash site appears to identify attributions with a numbering system which assigns a number to a clash mark in each different area. Someone correct me if I am wrong, but this coin appears to be unlisted. Were it to be listed, I think the description would be ADC-1¢-1960D(SD)-XX - 4 5 / 2 3 5. References: http://www.maddieclashes.com/1960sd/ http://www.maddieclashes.com/special-follow-up-article-from-coin-world/
