Nice grab! In the grand scheme of things, how rare is this coin? Looks like a worn die, so I assume that at least a few hundred / thousand were made? I'm sure that not many survived though!
As for coins with small things that make a big difference...
- This Caracalla denarius has a scrunched nose, which completes his scowl and IMO makes it one of the most lifelike and thus desirable coins for this emperor for my portrait collection. I have yet to see another portrait of him rendered so artfully, save for on aureii.

- This Omkara denarius is the rare Om variant, but better yet, the Om is written in an undescribed (but not unpublished - Maheshwari had one example but failed to notice it) calligraphy variant. Rather than the canonical 3 shape, it twists like a backwards S.

- This Malwa "Battle Scene" Gadhaiya is remarkable because while "crescent" eyes ad "comet" eyes are known, this has
both . IF these are supposed to represent the eye and nostril, this coin could turn Maheshwari's entire lineage for the series on its head.

- This "distinctive nose" type is rare in its own right, but better yet, it's the only one I have ever seen that has a moon...
on the wrong side and upside down 