Stamps. Colorado Annual Rocky Mountain Philatelic Exhibition to be held. Post May 12, 1957 Roundup p.33 Slogan cancellation announce by Post Office Dept. - into use March 15. RMN March 9, 1959 p.25A Historical Colo. stamps on exhibit at Shirley-Savoy during 121b annual Rocky Mtn. Philatelic Exhibition. RMN Oct. 7, 1961 p.32 Visitors jam Minturn for state-fete. Post Aug. 1, 1951 p.40 c.1 "Vacation Colorado" stamps on sale. Post Ap 6, 1966 p.51
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