Need Help with GBD Special

Here's a start: https://pipedia.org/wiki/GBD
Oh! I see you've been there already.

Well you've come to the right place. A lot of GBD collectors here. Give them time they'll chime in. The one thing that pops out at me is. The stem fitment is quit a bit off. Could just be rounded off. But wait for the pro's.

Here are some articles that might be helpful:
http://www.pipephil.eu/logos/en/logo-gbd.html
https://rebornpipes.com/tag/gbd-pipe-history/
https://www.glpease.com/Pipes/Collection/gbd.html
http://pipesmagazine.com/forums/topic/the-gbd-collectors-thread

Is this an oversized pipe?
Also, I have never seen a fake GBD. It just isn't a line that would be profitable to counterfeit, so your pipe is most likely genuine.
Doc

I suspect Scrooge is correct. That stem is so badly fitted it would never left the factory and the angled rondell would not have gone unnoticed either. Al is correct regarding post merger GBDs, the stem is very telling and because yours looks to be a replacement it makes it even more difficult to date with any certainty. The shape itself appears to match the #864 Medium Dublin as shown in the dealer catalogue (1968) shape chart. How long that shape was produced I can't say with any authority but in the post-Codogan Era, GBD pipes often retained their style numbers but utilized similar Comoy shapes because they were produced in the same factory. If I were to hazard a guess I say you have a pre merger pipe that has been re-stemmed, probably produced sometime between the mid sixties and 1981 but Al often makes the valid point that there was a post merger period where Codogan used up stock that already existed so the transition dates for pipes are not as solid as the official paperwork dates. Sorry I couldn't contribute more.

That might have something with the "Special" designation. It could well be those pipes were a clean out of old stummels. If so it would have been made pre-merger but came to market after 1981. This would make sense if they were already marketing the old style number on a Comoy shape. Exact dating of any non- Hall Marked GBD is almost impossible even under the best conditions and this one has enough quirks to really complicate an already murky task.