Camshaft timing when the sprockets are ONE tooth off from straight up.

Kern Dog said
THAT is an excellent explanation.
Ehrenberg also uses the term "Cap Screws".
Maybe he is just being facetious there?

a lot of newer (and european) workshop manuals make reference to cap screws as well. they don't differentiate on a lot of the fasteners in general either, just kinda all encompassing. i'm sure that some of it is lost in translation.