Methodological Issues Greek Overstrikes

General issues

The 1. It requires a series of explanations and caveats.

The level of confidence

In case an identification of the overstruck type is made, there are 4 levels of confidence: "uncertain", "weak", "strong", "sure". The level "uncertain" applies when one is not sure that this is really an overstrike (and not a double strike, or any other accident which may have happened).