Question about factory tilt column

[mahanian]

I picked up 2 factory tilt columns yesterday from a guy that's had them stashed away for almost 20 years. They are in pretty good shape, one has the factory half moon plug on it still and the other has a flat to half moon adapter. I started to get suspicious since I knew the van tilt columns had a flat harness, but he said the switch assembly had gone bad years ago and had been replaced. He said they no longer made the assembly with the half moon, only the common flat one with a half moon adapter was available. Does that seem logical? Everything else on it seems to point towards it being a factory C10 column, is there a full proof way to tell?