1969 GTS Dart 340-4speed(not mine)

Correct. Stripe is not "original." This car originally came with a black stripe (per build sheet and fender tag), but the original stripe bubbled from the factory in the first year per the original owner. The stripe was replaced under warranty and the 2nd stripe also bubbled/peeled. When the owner brought it back to Dodge, they ended up painting a black stripe on it.