four door cars always seem to stay in good shape. but the interior usually sees way more miles than the outside nice car
There are a few things that puzzle me. One is the glove box, I thought a 73 had a tray or maybe its an option. Also the shoulder belts are dated 10/73 and the car was built in 3/73 and delivered in April. Again maybe it went back to the dealer for them to be installed ??
73 was the change-over year for trays-to-glove boxes. The early 73's (built in late summer 72) were still using the tray. Your hypothesis regarding the seatbelts would make sense, I suppose.
great original condition car you've got there. I'd have a really hard time keeping it that way with such sleeper potential like that. lol