This system is not used any more in
GermanyFurthermore: There was no
standard, one always
had to look at the first page of the
auction catalogue to get a grip of the system.
The last
German auction to use this was "Kölner Münzkabinett" until around 2018 - but they used
Roman numerals and "III" was "
extremely fine".
You encounter a similar problem when referring to grades mentioned in catalogues of the beginning of the last century or even earlier - there is just no comparison possible.
Regards
Klaus