I saw this sheath at an estate sale and I like the odd stuff so I picked it up. It had an electrician type knife in it but I don’t know if that’s the true purpose.
This set would have been used during WW2 by a lineman as the CS-34 tool set, and features the TL-29 knife and pliers. These complete, original sets are getting harder to find, so don't miss out on this one!
As for the Utica Pliers, they say "No - 2" on them, and they do indeed look like the Duck-Bill pliers you provided a link to - but with the exception that the smooth jaw surfaces do not meet except at the very tips. I'm wondering if it might be for sheet metal work? Shelbylex is right...