Going by the engineering drawings the painted applique was used on :
Coronet 440 2dr ht's
Coronet 500 Hardtops and converts
Superbee-all
R/T all
I used to sell tons of chrome centers to customers who wanted to dress up the front ends of their Bees.
As far as front valence trim goes don't forget about Option A48-Front End Ornamental Package which was available on all models and consisted of front bumper guards and the front stone shield moulding.
This code does appear on fender tags excluding the Lynch Road tags.
I just did a quick scan of 20 Bee and R/T broadcast sheets and whats strange is some non A48 package cars have the trim and others don't.Definetly needs more study.