Elgin Grade 27

Here's an Elgin grade 27, an 18 size, 15 jewel, lever-set movement made about 1888. This B.W. Raymond model also was made in a 17 jewel variation.  

The balance cock screw is a replacement. The threading is completely shot in the plate and so someone used this screw with coarser threads. It's not holding on 100% itself, but it should be OK. I looked around for a better replacement, but the hole in the cock itself does not allow for a larger diameter screw.