In regard to the link LegendofSpeed provided in this thread, I see two different crowns in the 8 photos (two of the photos are of identical watches the PAM009A).
201A, 036, and 001A have the same crown thickness and teeth. This looks like the 48 teeth crown to me.
The pre-A 002, pre-A 009 pre-A 001, 002A, and 009A have the same crown. These look like the 52 teeth crown to me.
In my eyes I think they are definitely two different crown manufacturers being told to produce them during Officine Panerai, and during the first 2 years where Richmont first took over.
Here is an example of gen 5218-203A where there were roughly 200 made. If you look at the first two photos and the last photo, you can clearly tell that even with a single model pre-V there are two different crown on this watch. I can pull up some photos of pre-V 5218-207A where you can see this same difference in crown. I cannot tell you exactly how many teeth are on there but there is a clear difference in the number of teeth on there.
But from what people are saying are on their more recent manual wind PAMs. It should be fairly easy to deduce that the 52 teeth crown manufacturer was cut by Richmont. If you want try and determine the validity of the crowns being gen or not thats up to you guys to determine. I see these 52 teeth manual Ti and 52 teeth auto PVD/SS as being gen until proven otherwise.