The pliers that I bought from a typewrite repairman's estate and sold on Ebay in the early 2000s were mostly the Starrett No. 1 end nippers with specialized jaws, mostly for adjusting key rods. I could see the Utica pliers you showed being used to adjust the key rods. Were they any rounded (not sharp) jaws with the end nippers in that lot?
I could see the other 3 being for typewriters too. The lot I bought had tools for tweaking and turning things in odd places.