Wow sounds real confusing, I have no way of measuring the pitch. All I know is mine are the older style +3 long travel arms
If you have or know somebody with a tap and die kit they all come with thread pitch gages, they look like a feeler gage with saw teeth, you just match the thread up to the gage that fits, the gage will be marked with the thread pitch.
Everyone should at least have a tap and die kit in their garage if you are working on anything, even the cheap kits from harbor freight have saved me out in the dunes (leave the good kits at home)