Data request 1968- 1970 factory valve stem caps
 

Looking for feedback on assy line tire valve stem caps.
Some work has been done on this
Seems the stem- cap asssy was a standard part sourced as needed.
Taking for granted Schrader stems had Schrader caps and same for Dill.
Stems are marked on bottom.

Pics 1- 3 are Schrader bar top
Pics 4- 8 are Schrader dome top
Pics 9 and 10 Are Dill 627

Looking to narrow down usage and time frame of these 3 types