These Utica 87-7 duckbill pliers have a sideways bend. Did someone make these? They look pretty well made.
I have to believe that the "-7" in the part number is alluding to that bend somehow, as a No. 87 Duckbill Plier is a straightforward pair in their own right. My first thought is possibly a fishing implement. Plus, the length of the bent pincers wouldn't index together, the top would be shorter than the bottom.
This might explain the uniqueness but also why they look so well done. Utica will make custom pliers to the spec you request. Page 19 from this 1967 catalog
https://archive.org/details/UticaToolsCatalog67/page/n17/mode/2up