First time for me to find roof divider trim on a 64. I guess just for 2 tone paint jobs as Im sure vinyl tops werent being offered. Will have to see if someone can use it. 

I think Dave has it on his 64 hardtop.

https://canadianponcho.activeboard.com/t63182330/february-2017-feature-car/

D99 2 tone paint mouldings

Yes,   on my Hardtop.   Seen lots on 4dr sedans.  Also my 64 2dr post sedan had them even tho the car was totally tuxedo black,  it was on the build sheet.

I also had them on my 67 beaumont 4dr sedan and my 65 beaumont 4 dr sedan.

You could get these two tone paint mouldings on all models with or without 2-tone body colors.