75th anniversary of the UPU. Allegory of the UPU.
The General Directorate of Posts and Telegraphs, which is now defunct.
<a rel="nofollow" class="external free" href="https://colnect.com/en/stamps/stamp/209941-Universal_Postal_Union-75th_Anniversary_of_Universal_Postal_Union_UPU-Argentina">https://colnect.com/en/stamps/stamp/209941-Universal_Postal_Union-75th_Anniversary_of_Universal_Postal_Union_UPU-Argentina</a>