I've recently looking at some rarity ratings and I wonder if E-Sylum readers would like to express an opinion or two (or twenty :-) ). The question at hand is fairly simple:

There are a number of rarity scales. For the sake of discussion, let's assume that you know for sure that the R-7 rating was intended to be relative to the following scale, which I think is the scale most commonly used in a number of areas, at least when it comes to exonumia:

R-1: 5,000+
R-2: 2,001-5000
R-3: 501-2000
R-4: 201-500
R-5: 76-200
R-6: 21-75
R-7: 11-20
R-8: 5-10
R-9: 2-4
R-10: 1 (unique)

Here are some possible answers for what "R-7" might mean:

If you want to look at the question from the other direction, what rarity would you expect to see for each of the following examples? FWIW, each of these are real examples of items that I found described as R-7. I picked items where the original mintage is known. The question gets a lot harder otherwise!: