Old address books - possibly from 1800?

Hi folks,

Does anyone know the availability of old address books that cover the
Grand Duchy of Oldenburg, particularly the Loeningen area? The oldest
I've found is Verlag Berenberg'sche Buchdruckerei Großes
Landes-Adressbuch (Handels- und Gewerbe-Adressbuch) für Provinz
Hannover, Großherzogthum Oldenburg und Freistaat Bremen, 1899. I'm
hoping to find something closer to the the year 1800, but I know that
might be a long shot. I have seen address books from other parts of
Germany that early, so I know it's at least possible. Any leads are
greatly appreciated.

Thanks,
Andrew Laker

Andrew,
there would be nothing like an address book for rural areas of the old
duchy that far back. The villages were small enough that everyone knew
everyone else. In the bigger cities this was different.
Fred