I'm only passingly familiar with Roman debasement, but as I recall they tried all the tricks over the years: clipping, shaving, diluting.
Am I remembering correctly that Rome is where ridged coins were developed as a guard against coin shaving?
I don't think they had the technology for ridging, but I could be wrong. It certainly was a technique used later. Clipping was done frequently in ancient Rome.
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I just did a quick check. Apparently, ridging (which is actually called reeding) was first seen in European coins in the 1500's.
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Makes sense. Most of the Roman coins have really jagged, uneven edges if you can call them edges at all.
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