Many of the faults are visible on the scan such as clipped corners, pin holes, creases or tears; others such as thins are not readily visible but may or may not be present and should be anticipated. 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).Communication is a very valuable tool. Now, it could take 3-5 weeks but it will eventually get to where it is going. Thank you for your understanding. 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.