The clue here was Belgium, which has many links to Europe.
It was one of the original countries to join the E.C.S.C in 1958. Alphabetically, it is listed first, as it was in 1958, after the Treaty of Rome. which stated that "the office of President shall be held in turn by each member state in the Council for a term of six months, in alphabetic order of member states." It provided the first President of the Council of the European Union in 1958; who picked, for his HQ, his homeland`s capital, Brussels. And Brussels still remains the capital of the European Union.
This set first appears in our original British Trade Index Part III, as :
World Cup 1970. 76 x 56. Nd. (48) … ANF-20
However, the listing in our updated British Trade Index is :
WORLD CUP. 1970. 76 x 56. Sketches. Nd. (48). Backs have sketches of football hints. … ANG-450
This entry is not strictly correct, as you will see if you visit our Card of the Day for 27 November 2021, because not all of the backs do have “sketches of football hints”, some, as we show here, have flags and team details.
Via that link you will also find a fuller listing, and even a scan of the original write up from the "Cartophilic Notes and News " magazine.