Thank you Luis! At top is Abu Simbel, a stamp token of diplomatic relations with Egypt from 2010. Below, paleontologist Peter Lund is commemorated with the background of the Lagoa Santa cave, where he famously discovered Pleistocene megafauna and human remains.
Did you know the 'DH' stamp stands for Depois da Hora or after the hour of 4 o'clock? Meaning the letter would not go out until the next day.