Most of my change requests have been addressed rapidly, but several have sat in the queue for over a month. And the last half of December is a busy time for many people.
I'd suggest more research and then add the result in comments. Just seeing two coins leaves open questions:
Is just one year different from the others?
Was one style used up until a certain year and then another style later?
Verweis : "Dejan"Then - if not variants - what? Shouldn't they be somehow marked differently?
It depends if the differences are "huge", the KM normally made either a new sub-number or a completely new number, if the alloy changed, then a letter was added to the existing km#.
Since Krause has stopped giving the numbers, we are really in a mess!