SCG3412 - Argentina 20 Pesos Instructional Stamp – "Coloque Aquí"This unusual 20 pesos instructional stamp from Argentina features the phrase "Coloque aqu sus estampillas" ("Place your stamps here") accompanied by an arrow and stamp outlines. Designed in blue and white, it was not issued for postal use but rather served as a label or instructional aid, likely for postal forms or documents requiring additional stamps. It reflects the country's emphasis on clear postal procedures during the mid to late 20th century.