Columbia VS Talkophone Horns

[Phonofreak]

When I first started to collect, I read about the lawsuits between Columbia and Talkophone. As a result, Columbia bought out Talkophone. Columbia used Talkophone components for thier front mount, rear mount, and client machines.I have noticed Columbia front mount machines using Talkophone horns and elbows.Most of these machine that I have seen are the BA front mount and the late model AH. Are these configurations correct or are they marriage of parts? The reason I ask this is I'm completing a Columbia BA and it came with a Talkophone horn and elbow. I have seen other BA machines like this one. Any insight on this?
Harvey Kravitz