Does the 1-70 grading scale get applied to all collectible coins, current and obsolete? And........

................... how far beyond the shores of the USA have PCGS and NCG's slabbing services reached?
For question #1, does the 1-70 grading scale get used to grade currently produced coins from countries in Africa, Asia, the Pacific, South America, etc. Further, does the 1-70 scale get used to grade obsolete coinage, including for example 2000-3000 year old ancient coinage and other coinage [such as the large round stones with holes in the middle used as coins in certain cultures a long time ago (think of the size of the slab used on such a stone)]. Some how calling a 2000-3000 year old coin a 4, 6, 8, 12, 15, 20, 25, 30, 35, 40, 45, 50, 53, 55, 58 or 60-70 seems meaningless since I assume that the production technolgy of the day and the quality of a newly minted piece back then would be things which are not known today and which are forever lost in the mists of time.
Question #2 is easier to answer. How many countries (current or past) that produce or have produced coins have had specimens of their coins graded and slabbed by PCGS or NGC?
It would be an interesting project to get a list of those countries and then seek out and acquire slabbed coins from each of those countries. It would make quite a display of coins.
For question #1, does the 1-70 grading scale get used to grade currently produced coins from countries in Africa, Asia, the Pacific, South America, etc. Further, does the 1-70 scale get used to grade obsolete coinage, including for example 2000-3000 year old ancient coinage and other coinage [such as the large round stones with holes in the middle used as coins in certain cultures a long time ago (think of the size of the slab used on such a stone)]. Some how calling a 2000-3000 year old coin a 4, 6, 8, 12, 15, 20, 25, 30, 35, 40, 45, 50, 53, 55, 58 or 60-70 seems meaningless since I assume that the production technolgy of the day and the quality of a newly minted piece back then would be things which are not known today and which are forever lost in the mists of time.
Question #2 is easier to answer. How many countries (current or past) that produce or have produced coins have had specimens of their coins graded and slabbed by PCGS or NGC?
It would be an interesting project to get a list of those countries and then seek out and acquire slabbed coins from each of those countries. It would make quite a display of coins.
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Below are a few of mine (I know, I know, they're not US Coins... please don't hate me!)
Sea-eagle 400-350 BC Istros AR Stater silver
Parion, 350-300 BC., silver hemidrachm; 2.4 grm. Obv. Gorgoneion facing. Rev. Bull standing left, looking back
King Alexander III the Great Macedonia 336-323 BC silver Tetradrachm
General Tribune Consol 2nd Triumvirate Marc Antony 31 BC issued to the 7th Legionary at the Battle of Actium, silver
General Consul First Triumvirate Dictator Julius Caesar 47-46 BC silver (minted in North Africa during battle with Cato)