It is all about the egocentric view of the wtBtS. inc. they like everybody to have: From the study today, For centuries the rival kings "could not be identified" because
there was no WT Society before The 1870s, and conveniently there was no KotN. Prussian german empire before that period either.
Similar parochial views are repeated on WT's 'Faithful & Discreet Slave' doctrine of 1919: wherein there was no approved provider of spiritual food before that date either.
same old, song: Wt. inc, WT, ueber Alles in der Welt.