Dies were very valuable at the Potosi Mint and were used until they failed. Overdates are common and dramatic. In the Carlos III 1 real series there are 8 known overdates, all fairly common, in a type coin with only a 17 year run. The coolest one is the 1780/79 double digit overdate. I don't have the 1 real but have the 1780/79 8 reales version.





















