If you are referring to if the thread pitch is the same so you can use a Viking or Falcon bowl on the same stem...not sure of that answer but I do agree with Lawrence. :rofl:
I am sure some one here will know. I can't find it but I do recall someone here being a huge Falcon fan.
There is also some old Dr. Grabow threaded pipes out there.
Good luck with that spyder. They do come up on the bay occasionally, but rarely just the bowl by itself.
Nice thing about the Vikings though is they can usually be had for considerably less than the Falcons and essentially the same thing. I have 4 of the Vikings, great smokes and durable as all get out. Didn't give more than $7 for any of em'.
That sounds about right and it's just what I feared... I have 4 of the things now! One of them is the first style that Falcon sued them over. I keep getting them on lots of pipes, but now I feel bad cuz I did pay a whopping 10.00 for a single one I just had to have