My airframe logs have a spec, AF5-1, a hardbound green book with pages
numbered as watermarks---large, center of the page, visible but easily
able to see text written over the top. Engine and prop logs come from
the manufacturers, but they both appear to have numbered pages.

I have never seen an American logbook with numbered pages. The Canadians have
a system of standardized logbooks that is really pretty good. Different color
covers for Airframe, Engine etc. with numbered pages.