Dumb question I know, but one can never be sure.

I un earthed 2 Cinelli "Aero" stems from my secret stash for my Faggin project, and need to determine age.

One has the angled binding block quill, with the inset Cinelli logo being perfectly flush.

The other has an aluminum conical expander, with the Cinelli logo being inset (recessed slightly).

I am assuming the former is older, and would be correct for my 84/85 Faggin.

Is this correct?