69 dart ext. windshield trim ?
there is a photo in this post
convertible w/shield lock strip
This is from precisions website
recently I have found 2 NOS lock strips for 67 Dart one was convert the other was 2Dr HT or 4 Dr HT and t is just a bit too long so with a trim it will shorten. both were like the one on precisions photo with the chrome internal to the plastic.
Mine (the glass was replaced once post 1973 and I do not know if the lock strip was replaced or not) had the chrome on the outside of the plastic so it all came off over time like the OPs