If you still have these vices could you post a pic or two. Thanks
I don’t iwn sny of these vises, but I believe these are Stanley bises, based somewhat on older North Brothers “Yankee” brand vise designs, which Stanley would have acquired when they bought North Brothers, or at least the NB Tool division and Yankee brand.
I believe Stanley made the fixed jaw of the vises square to the base though, to allow more drilling and mounting options for more versatility.
I believe otherwise the Stanley vises were similar, with a similar rotating base mount.
Yost and Morgan still make/sell a similar vise, although usually only in one size, where the North Brothers and Stanley versions where available in three or four sizes.