Catalogers of high grade modern coins often boast about coins having only a few specimens, or even no specimens, known in a higher grade.
Ancient coin catalogers will sometimes say "finest known" but they rarely say things like "only a population of 43 coins better".
On NGC's slab verification pages, for example https://www.ngccoin.com/certlookup/4629247-016/NGCAncients/, there are no population reports comparable to modern coins. That page says "Total Graded by NGC: Not Available".
Yet I noticed the Heritage Auctions web now includes NGC Ancients population reports. I noticed this watching their Long Beach auction yesterday. Here is an example from a recent Heritage online-only auction: https://coins.ha.com/itm/ancients/g...m-9h-ngc-ms-5-5-3-5-test-cut/a/231836-61011.s . The auction listing displays the slabbed population with the grade of the current lot highlighted in yellow.
Here is the owl population as of September 7th 2018:
The auction house gives an NGC population report and includes the count ranked star (= "impressive"). They don't mention "fine style" or "test cut" or the x/5 ratings. This particular lot has a huge test cut that doesn't make it into the numerical chart.
I was curious to see the single starred "Choice MS" example in the above population report. It is https://coins.ha.com/itm/greek/anci...22-gm-5h-ngc-choice-ms-5-5-5-5/a/3066-30035.s, and it sold for $36k last month.