Roman? Coin Needing Identification

As of Commodus

Sorry, if this is heavy, and it does look thick, I should have said sestertius as well.

That sounds like either an exremely heavy as or a lightweight sestertius with a copperish look struck on an extremely thin flan

(It is not uncommon for sestertii from that era however, to vary wildly in weights and flan sizes)

Maybe AE Sestertius, RIC 1588 to 1590 (M.Aurelius) ?
Here an example of one of these types:



What do you think?

Not unrealistic at all to try! But it is also possible you may never find them, depending on the coin. For this particular type, I honestly don't know how hard can it be. Also, keep in mind that you can probably find only one die match and not necessarily both obverse and reverse matching at once.




Usually coin measurements are enough, generally speaking of course. Flan size is by far the most notorious way to tell for well patinated coins, where asses and sestertii coexisted with similar designs.
Also, an as from this era will be made of copper whereas a contemporary sestertius should be made of an alloy identical to bronze. If by any chance some of the bare metal can be seen (As in a scratch, for instance) beneath the patina, that's another way to tell.
This coin looks copperish, but from the pictures I am not able to tell if that's just how the patina looks.