Bidspirit auction | 2017 ROBERT A SIEGEL SALE
2017 ROBERT A SIEGEL SALE CATALOGUE NO.1168 NOV.2017 ,THE BARRY P. FLETCHER COLLECTION OF COLOMBIAN AIR POST ISSUES 1919 - 1923
2017 ROBERT A SIEGEL SALE CATALOGUE NO.1168 NOV.2017 ,THE BARRY P. FLETCHER COLLECTION OF COLOMBIAN AIR POST ISSUES 1919 - 1923