Roberts tack strip cutter model 590, carpet & rug installation tools, new old stock lot of 3

Lot of 3 vintage Roberts 590 strip cutters for cutting tack strips when installing carpets and rugs. These are new old stock from the 1950s or 60s and they are marked with a patent number from 1955.

They are about 7 3/4" long with a 1 1/2" cutting blade. These do have some light rust / discoloration to the bare steel upper blade from storage.