My research has established that there is a shoulder on the dies for all
US coins which, along with the collar, creates the design rim. The proto rim is created during upsetting.
The off center strikes are interesting. The
Ike dollar, for example, shows a complete design rim. Most of the others show a partial design rim, while some show no design rim. It seems to me that where there is no design rim on off center strikes (be it on the full strike area or on a portion), the most logical explanation is a slightly tilted die - which would be expected from an off center strike.
Edited by Pete2226
12/03/2016 10:42 am