Let me start by saying this kinda item isn't within my field of knowledge, however if you can find someone who is restoring either a car or more likely a bus that these would've originally been fitted in they would love to find original parts such as these.
Quite how you'd find the right person I've no idea but I would think there are websites for car/bus enthusiasts that specialise in vehicle restoration.
@AntisocialTroll Far out from my field of knowledge. I do know there was a street car system in the city. Several different adaptations. 1880s until the 1930s. Even a terrible crash of one on the 4th of July 1900. I hope these seats arent from that.
@icedsky Despite it not being my field of knowledge, I'm going to say it's far more likely they were stripped out from a streetcar once it became obsolete because I don't think the seats would've been preserved after a bad crash.
@icedsky I'm sure you can find a buyer for them, even if you can't find someone restoring a vehicle they are the kind of thing that goes very well in a man cave.
I'd start by looking online for people who restore vehicles, I dunno if there's any kind of museum for streetcars/buses but that'd be another avenue, people absolutely love to find original parts such as these.
