Documentation, sometimes simple, sometimes complicated, (like provenance from auction), if the French Planchet was 2.8g and the Latvia was 2.5g and both Metallurgically the same...then certain aspects could be matched to which mint produced. I was adding to my U.S. struck Foreign coin collection and I enjoyed the comparisons in my mind of which mistakes have happened and which ones we know of etc,..pretty cool stuff...could also be the Boys and Girls doing direct submission then returning them to the U.S. market, which might account for a few more Obscure coins from obscure countries slabbed. More POPULATIONS of graded coins of 1 only and/or 2,3...5,6 certified now/soon/then...etc..