Portugal's 1 Euro coin has an error in which it has 28 instead of 29 reeds. My question is: what gets counted, the incuse portion or the portion sticking out? https://en.numista.com/catalogue/pieces159.html
As far as I know, you count the incuse bits, as the others have the same "height" as the plain parts of the edge. In the photo, the upper piece has the regular edge. The lower one has the error that occurred on a few Portuguese €1 coins dated 2002 ... Christian
