Here are a couple of examples that will show you what to look for:
This pic shows the sheared secondary devices that is common with Machine Doubling. This is the same as on the coin that you posted. Flat and shelf-like. This doubling is the result of chatter from a loose die:

This pic shows a doubled die. Notice that the secondary devices are the same height as the primary devices:

This pic shows the sheared secondary devices that is common with Machine Doubling. This is the same as on the coin that you posted. Flat and shelf-like. This doubling is the result of chatter from a loose die:

This pic shows a doubled die. Notice that the secondary devices are the same height as the primary devices:

Edited by ikandiggit
11/12/2011 08:28 am
11/12/2011 08:28 am























