Fuld rarity scale

·       R-1: Greater than 5,000

·       R-2: Between 2,000 and 5,000

·       R-3: Between 500 and 2,000

·       R-4: Between 200 and 500

·       R-5: Between 76 and 200

·       R-6: Between 21 and 75

·       R-7: Between 11 and 20

·       R-8: Between 5 and 10

·       R-9: Between 2 and 4

·       R-10: Unique (one known example)