On my '72Z I just got my hands on, there are a series of snaps on the interior passenger door. Also along with that, it came with a "satchel" with the same pattern on it. It seems to me that on my ex's brothers '70 Z, when I saw it, a long long time ago, it had the same snaps on it. Obviously the satchel snaps to these ( I guess)....my question is, are these from the factory? Are they a dealers ad on? Are they owner installed? Any info or input would be appreciated.

Most likely Owner Installed - usually seen on cars that were used in Rallies. Snaps were also used to hold Safety Netting across open side windows on cars that were raced.

FWIW,

Carl B.

Thanks for clearing that up for me, Carl