USA Scott Catalog # C1 Used Graded and Encapsulated by PSE as 95 Updated on October 17, 2023 By admin Comments Off A nice USA stamp, Scott Catalog number of C1, that is Used. It is orange in color, a 6 Cent denomination, from 1918. This stamp is protected in a special encapsulated plastic that PSE used to do. Graded by PSE as XF-Sup 95. Share Tweet By admin You May Also Like U. S. (Scott C13) AIRMAIL 65¢ GREEN GRAF ZEPPELIN (MFNH) FINE, NEVER HINGED US Scott #C3 Airmail Single VF Mint Never Hinged Issued 1918 Fast Plane Variety