These unique and unmarked prototype .32 ACP pistols are apparently Iver Johnson prototypes - and I can't find any information on them beyond that description from their consignor. One is a simpler example in the white, and the other is a more developed example with both a manual safety and an unusual style of grip safety. If anyone has any further information on these, I would be interested to hear it!

Update: A viewer sent me the link to this US patent, which covers these guns and is, in fact, associated with Iver Johnson:
https://www.google.com/patents/US992854