Jay,
I was holding out to see what others would have to say, hoping someone would provide a positive ID on your camera. The only Agfa studio camera that I'm aware of in a triple standard/double bellows configuration is the Agfa Studio No. 5 from their
1941 catalog. Of course, there's a lot in this world that I'm not aware of, so that's far from conclusive. Your camera does seem to bear more of a resemblance to one of the Century cameras (
here), especially in the fine focus mechanism.
One thing to keep in mind is that manufacturers may have occasionally made custom or slightly modified models to meet customer requests. I have an Agfa Studio 5a which is black, even though it wasn't offered in the catalog in black, as far as I can tell. One would assume that someone along the way decided to paint it black. But it's done so well that it really makes me wonder if it were not a factory job. I'll never know, I'm sure, and I like the black finish anyway.
And it's certainly possible that some cameras share parts from other cameras. Especially in the workaday world of studio cameras where one is interested in maintaining productivity and income rather than authenticity or aesthetics it's not inconceivable that a broken part be replaced by what's quickly available than by the OEM piece. But I'm just speculating. They're fun cameras to use if you have the room - and especially with the old lenses.