Airmail - The 50th Anniversary of International Labour Organization - Issues of 1968 Overprinted "Cincuentenario O.I.T." and Ornaments 1970
現在展示： 危地馬拉 - （通用）郵票 - 1970 - Airmail - The 50th Anniversary of International Labour Organization - Issues of 1968 Overprinted "Cincuentenario O.I.T." and Ornaments - 4 郵票.
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