Drew,
I keep returning to the photos of the flat framed boxlock (Baker Ejector?) you posted as it is much different than any of my other Baker models. Looking at the barrel lug there is no cocking bar, nor cocking hook, nor check hook. My Baker Standard has the same barrel lug. It uses cocking rods, very much like a Crescent, but with no solid check to keep it from opening too far. Maybe caused by wear at the forend iron where it engages the rods?
The other difference I see is the top bolting of the flat framed gun. It has what appears to be a round "Greener" type bolt. Yet the bolt does not extend out the left side of the frame when open. ???
If anyone has an example of one of these flat framed Boxlocks please post up pictures.
Thanks, John