In the poster below (dated around 1960), I can identify all flags except the very first one. It is a tricolor flag with vertical stripes, being black, red and yellow/gold from left to right. Essentially a rotated German flag, or a Belgian flag with the red and yellow bands swapped. Which country/nation/... does this flag represent?
A table containing the countries corresponding to the flags in the poster:
??? | France | |||||||||
Switzerland | Italy | Sweden | (West-?)Germany | United Kingdom | Austria | Czechoslovakia | USSR | Belgium | Norway | Spain |
Yugoslavia | Poland | Hungary | Netherlands |
From the context, this flag is very likely to represent a European country. I did a bit of "research", and came up with the following guesses:
- It could just be a mistake.
- It could represent East Germany. The German flag as seen in the second row was originally the official flag of both West and East Germany. However, on 1 Oct 1959, the East German flag was changed to incorporate a coat of arms. Apparently this new flag was considered offensive in West Germany (and even banned), so perhaps the flag on the poster is deliberately not the actual East German flag?
I also found some nations that used this flag historically, but are rather certainly unrelated:
- Pagaruyung Kingdom & Inderapura Kingdom. Wrong place & time.
- Principality of Reuss-Gera. Part of modern Germany, but was disestablished in 1918.