Old commode-- trying to ID

I found this old commode in a shed in Michigan. The shed I found it in is about 100 years old but of course that does not mean this is 100 years old. It appears to be oak, has a lid that flips open to reveal a wooden toilet seat that also flips up-- the hinges on the inner lid are unfortunately broken, but other than that it is in good shape. There is also a little chain that used to probably keep the lid from flipping too far, but it is broken-- just a couple of pieces and the connectors remain. I'm sure it used to have a chamber pot inside, but I couldn't find it in the shed. Anyone have any insight on this? I have only found a few similar models on the internet but nothing exactly matching. There are no maker's marks, only a stenciled "2" under the toilet seat area.

The first picture is top open, second is close up of the joints, third is top open, seat up, last is as it sits.

Thanks