These hood clips came with all of the T parts I bought recently. The seller assured me they were for a T, but I am not so sure. They kind of look like Model a clips to me.
Did Ford ever use this style on Model T's?
Yep, insides of Model A clips. They look like originals, as most repros aren't formed that nicely. You are missing the outside shell, spring, spring keeper pin, base mount (3 screw for 28-29, 2 screw for 30-31) and the base mount rivet (this for each clip).
All Model T clips were variations on the circular theme.