No idea at all...but it looks like it would be easy to adapt to an A or B by shortening the shaft and milling it to a drive tab and adjusting the shank to diameter of B distributor.
Thanks Bruce- I was told it's possible, by a few different people. That might be what I'll end up doing. I sent some pics to H&H and they thought it could have been used for an old Cosworth.
Looks to me like it might be an external-driven magneto. is that a keyed shaft with a nut to hold a pulley in place? Then you'd just have a piece of slit tubing to pinch the dark part of the base and run a belt to the crank or whatever, i've seen deisel turbo tractors coverted to alcohol and sparkplug/magneto ignitions clamp the magneto to the head and let them hang out over the front of the engine to be driven.
I was told Vertex was bought by Taylor. I called Taylor an they don't have a lot of records from Vertex because at some point their building caught on fire and do***ents were lost.
Make sure the rotation is correct for your application. They will spark going backwards but the internals are directional.