OPC 1972 USS Cavalla SSN 684 Sea Trials Cachet Groton CT 47704
S$ 2.33
Event
OPC 1992 Chicago ILL World Columbian Stamp Expo Postcard Unused VF Embossed A
S$ 2.33
1972 US & Germany Olympia Philatelie Munchen Event Cover Unaddressed 21414
S$ 6.49
1934 Montpelier VT 143rd Anniversary Admitted to Union
S$ 3.63
OPC 1966 Chicago Compex Man in Space 1st Exhibition Perfin Card 45405
S$ 2.33
OPC 1985 Dixon ILL Ronald Reagan Inauguration Day Artcraft Cachet 44009
S$ 3.89
OPC Lot of 6 US 1970's Arctic Covers 1 CO Signed
S$ 3.89
OPC 1954 USS Massey DD 778 Return of the Black Ships Cachet Cover 47705a
S$ 2.59
OPC 1954 USS Massey DD 778 Return of the Black Ships Cachet Cover 47705
S$ 2.33
OPC 5-21-1947 NY International Philatelic Exhibition Sc#UC17 Unaddressed
S$ 2.33
OPC 1952 RPO First Trip Chicago-St. Louis Gulf Transport Co. 47167
S$ 2.33
OPC 2003 Dallas TX Dr Caesar A.W. Clark Building Dedication
S$ 3.89
OPC 1974 Wespnex White Plains NY When Eastchester had the White House 43958
S$ 2.33
OPC 1961 Chicago ILL Board of Education 50th Anniversary Cachet
S$ 3.63
OPC 1965 Waukeegan ILL Lacopex 65 Exhibition
S$ 3.89
1952 Chicago Philatelic Society Historical Cachet Clark St. near Randolph
S$ 3.89
OPC 1981 Milwakee WIS Milcopex Unaddressed
S$ 2.33
OPC 1973 Fleetwood President Nixon Inauguration Unaddressed
S$ 3.89
OPC 1966 Evansville Stamp Club Indiana Sesquicentennial 45727
S$ 2.33
OPC 1958 NY NY Ispex Station Sc#1031b Plate Block Unaddressed
S$ 3.89
OPC 1978 Euclid Ohio Eupex 50th Anniversary 1st Ocean Crossing 43718
S$ 2.33
OPC 1980 Harrisonburg VA 200th Anniversary Cancel & Cachet
S$ 2.33
OPC 1981 Sheboygan Wis Shepex 100 years of Red Cross on Sc#UX88 Unused 43702
S$ 3.89
OPC 1953 Tampa FL 59th SPA Convention 2nd Day
S$ 3.63
OPC Pompex 79 Corvallis Oregon Unaddressed
S$ 3.63
OPC 1979 Knoxville TN Westopex 10th Anniversary Walk on the Moon
S$ 3.89
OPC 1985 Ronald Reagan Inauguration Day Cover Real Usage
S$ 3.89
OPC 1974 Miami FL Postique Grand Openning Cachet
S$ 3.89
OPC 1971 Washington DC 50th Anniversary Philatelic Exhibition
S$ 3.89
OPC 1968 Chicago Philatelic Society Exhibition Abe Lincoln Cachet 43716
S$ 3.89
OPC 1962 Chicago World Flower and Garden Show McCormick Place
S$ 3.89
OPC 1981 Chicago 32nd American Topical Assoc. Convention Unaddressed 43709
S$ 3.89
OPC 1981 Chicago 32nd American Topical Assoc. Convention Unaddressed 43710
S$ 3.89
OPC 1986 Milwaukee Wis Polapex on Sc#UX108 Unused 43699
S$ 3.89
OPC X5 Different 1986 Portage Wis Old French Days at the Portage Unaddressed
S$ 7.79
OPC 1976 Philadelphia International Exhibition Specialists Day 43715
S$ 3.89
OPC X2 1973 Norfolk VA Skylab III Atlantic TF-140 Recovery Force
S$ 3.89
X5 1973 Hampex Unaddressed Event Covers
S$ 6.49
OPC 10-7-1979 Pope John Paul II Papal Visit Station Washington DC Sc#U581
S$ 2.07
OPC 1974 US Bicentennial Block Sc#1546a Artopages Cachet Uncanceled 44025
S$ 3.89
OPC 1971 Washington DC USPS 50th Anniversary Philatelic Exhibition 43959
S$ 3.89
OPC 1930 Wilmington North Carolina Bicentennial Pagent Signed 45793
S$ 3.89
OPC 1959 Birmingham Ala Dixipex II Salutes the United Nations
S$ 3.63
OPC Lot of 6 Houston Texas Stamp Exhibition Covers 1957-1982
S$ 10.39
OPC 1968 Chicago Compex Program Card with official Perfin 45415
S$ 7.79
OPC 1959 San Diego CA 12th Assembly I.C.A.O. Last Day
S$ 3.89
OPC X2 1978 20th Anniversary Chicago World Flower and Garden Show
S$ 3.89
OPC 1975 Kennedy Space Center Apollo Soyuz
S$ 3.63