Does anybody know where I could find this fitting which is a reducer? photos included

[elmocambo]

I think it is a gas fitting, although it is used in an old LNER station lamp post.
The reducer female part measures 15/16" the male part measures 1 5/16" approximately.
It is stamped WALWORTH MADE IN THE USA
It also fits the lamp shade but is actually from the post to support a braced cantilever piece of conduit.

 

[ShaunCorbs]

Hard to say without seeing a tape on it but looks bsp/npt so might be in look with a 1”x3/4 reducing bush

 

[elmocambo]

Hard to say without seeing a tape on it but looks bsp/npt so might be in look with a 1”x3/4 reducing bush

Thanks Shaun
I obtained one and it seems compatible and fine for my purposes which isn't plumbing but restoration.
It's a tapered thread so not sure how much to tighten safely