This is a job for Joe Offer! Joe, we need you ...
not as a moderator,
but as a lifelong student/speaker of the German language.

When Jos mentions this archaic counting convention --
archaic in present-day English speech, I mean --
what I think of is the counting convention Auf Deutsch.
In German, it appears to me,
this counting convention has been in place for centuries
and continues to the present day.

five-and-twenty --   fünfundzwanzig , for example.