A pretty, gold coloured metal pin badge from Sabena, Belgian Airlines.
The badge face is 2.2cm wide and has a long, stick pin fastener.
There are 3 types of Sabena logos. This one appears to be Royal Sabena where the logo adopted the royal crown and flew King Baudouin of Belgium around on state visits after World War 2. You can see him and the logo in the third picture.
The golden star indicates the territory of Belgian Congo and the Sabena colours are basically the Congolese flag (far right picture) with a blue triangle over it.
Belgian Congo became the Democratic Republic of Congo in 1960 and the star was dropped from the Sabena flag. So this dates this pin into the 1950's
