We need a new year line, see below:

It's derived from Jansen's catalog:

I doubt the reeds per centimeter. He states his coin is 2.8 cm which gives a perimeter of 8.7964594301 cm. Thus a coin with:
19 e/cm should have 167.13 reeds in total
24 e/cm should have 211.11 reeds in total
This doesn't correspond at all with my two coins, as can be seen in this documentation, my counts might be wrong though, but not so far off, first my coins, if you want to recount, and then the documentation:



Thanks for having spent your time on this
Ole