Old part found in 20's dump with patent number on it. Any ideas?

[Nathan6309]

I went detecting today in a park that was once a dump in the 1920's and found a part that I am clueless about. I looked up the patent number, but didnt come up with anything. The piece looks almost silver-plated. Does anybody have any Ideas on this one?

 

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Insert for bathroom sink drain.part that you see in the sink
Screws into the tailpiece under the sink

 

[Nathan6309]

Oh yeah! That makes perfect sense now that I look at it. Any ideas to how old this one would be?

 

[nhbenz]

Although it’s a whole lot like the part described, this patent here (from 1938) for a leaching system does include the apparatus for it, so I can’t help but think it’s related to it.
https://patents.google.com/patent/US2136372

-I can’t tell, is this piece threaded, or is it just ribbed?

 

[Nathan6309]

It's threaded.

 

[Nathan6309]

It's threaded.

 

[csa1865]

I have a old claw foot tub and old sink and the sink has this same piece on it in our 2nd bathroom .