I posted this over on the vintage mustang forum and someone over there thought it should be posted here as well. I replaced the rubber bushings on my 3 speed shifter and that required pulling the front carpet up for the first time. I found this tag in the process.
This is from my 67 Vin# 7T01C225507, 2 door hardtop, standard interior, Nightmist Blue, build date April 7, 1967
It is an unrestored original that sat in the original owners garage for decades. I bought it last year and put it back on the road.