USA                                    Colorado                                

                                                                                    

 Capital City:Denver

    

Former normal series (1977 - 1999), Rocky Mountains silhouette, 3 letters-3 numerals in 1982-92, PNP = Arapahoe county (Littleton)

Former normal series (1977 - 1999), Rocky Mountains silhouette, 3 letters-3 numerals in 1982-92, MDN = Boulder county (Boulder)

                                                                 
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