1969 Dart Convertible Windshield lower trim

On the convertibles what is used on the lower strip on the gasket is a locking plastic strip much like the 67 Dart/ Barracudas used. It locks into the window gasket groove. It is available repo but expensive.
Depending on what your doing with your car (care about original or not) some use the lower chrome molding like the hardtops have, but this needs to be shortened a little (off each end, to long) This is what I am doing, I like the chrome look. There are no clips in this area so I tuck the chrome under each corner and Butyl seal under the chrome at various places to hold it.
If you already have the chrome strip, it would indicate someone has already decided to change out the plastic locking strip for the chrome.