72 Demon Bench seats

I was browsing around for some decent seat hinge covers for my 72 Demon. My demon was built and sold in 71, it's a 72 model though. It has the smaller hinge covers, see attached. Shouldn't it have the longer, curved covers? All the references I find show the small one from 73-76 and the curved one from 70-72.

This is a one owner car, and they assure me the seat and hinge covers are original. What's up here?

70-72.jpg

73-76.jpg