Makes sense. Most of the Roman coins have really jagged, uneven edges if you can call them edges at all.

I just did a quick check. Apparently, ridging (which is actually called reeding) was first seen in European coins in the 1500's.

Undisciplined

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. 

siggy47

econ

What an Old Coin Collection Tells Us about Money from the Past

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?