I think I see some fainter markings also. My bet is that the Garr Klontz marking is that of a previous owner and not the maker(s). Based on similarities and differences in the details, it would appear that at least two manufacturers made the planes. Great find on these. I think the cheapest wooden planes I have come across were around $5. The $5 vise and the $10 box of planes, along with these planes probably qualifies you as the forum’s best bargain hunter so far.