There are four main categories on Match & Medicine as described by type of paper and years of issue. The following is a table of all. "A" Old Paper (1862 to 1871) "b" Silk Paper (1871 to 1877) "c" Pink Paper (1877 to 1878) "d" Watermarked Paper (1878 on). Pricing for match and medicine stamps is also unlike other areas of philately. Stamps with small faults typically sell for full catalog value or a large percentage thereof.VF or better stamps with no visible faults can go for several time catalog value. This item is in the category "Stamps\United States\Back of Book\Revenues". The seller is "bigjake111" and is located in this country: US. This item can be shipped worldwide.