What identifies 69 Dart GT on fender tag ?

View the 69 dealer brochure here for lots of good info.
The 1970 Hamtramck Registry - 1969 Dodge Dealership Data Book - Dart

I also found this which describes how to decode the VIN.
How to Decipher a VIN Code on a 1969 Dodge Dart

or here...
1968-69 Dodge Vehicle Identification Numbers (vin)