I don't know what happened to my response last night. O'll try again.
Stock 49 is the guy that could answer this. He has lots of experience with his 216, a near twin of the poured bearing 235. I haven't seen the inside of one for over 50 years.
I don't see a locater tab on the bearing along the parting line which an insert bearing would have. There seems to be a lot of crud on it and that makes it hard to see. On the mating surface around the lower bolt hole there seems to be a clean space that reminds me of the shape of the shims that the babbitt engines came with. They were used to adjust the bearing as they wore. I really can't tell from the photo. Ask the seller to pop the bearing shell out.
