Came off a roll on the assembly line. Here's the OE from my Bee. Probably die formed in a 6 foot open/close extruder. I think the # only showed twice on mine, maybe 3 times.Something I found interesting on the trunk seal on my 67 dart. It seems to be a formed seal. Rather than a roll of seal applied. The reason I believe it to be formed is there are part numbers on the rubber of the seal and it has evidence of casting / tooling marks.
Same here 67 dart it is in the same place on the drivers side and the pass side.I think the # only showed twice on mine