Michael wrote in
:

Any thoughts on the quality of these planes? Would you say better or
worse than Stanley?

No idea about Pritzlaff.

Fulton is Sears (from before the days of Craftsman)(*). At
different times they were made by Stanley and Millers Falls.
As users they're probably fine, certainly no better than a
Stanley branded plane (of the same vintage) but likely no
worse.

Guys who are really into planes can tell who made a Fulton
plane by obscure details like the length of the adjusting
lever or the exact position of the cap iron hole...if you
were really curious you could search one of them out on
the old tool groups.

(* apparently there never were Seroco planes)

John