The badge after rear side window and script on front fender makes it 'just' XL and different model than the Galaxie 500 2-door Fastback Hardtop -63A-. There is an independent classification for these rares in the site: the Ford XL This one is XL Fastback Hardtop (also called SportsRoof) [57F]
1970 Ford Galaxie 500 XL Fastback Hardtop Coupe .Contrary to the Ltd the Galaxies and Customs had no hideaway lights and the grille as seen here was very different.