Estonia

Nov 1, 1918 | Country flag, Merchant flag, State flag |

El Salvador (Motto)

May 17, 1912 | Merchant flag, State ensign, State flag, War flag |

...

El Salvador

May 17, 1912 | Naval flag, Special, State flag, War flag |

Flag with the weirdest proportions....

Portugal

Jun 30, 1911 | Country flag, Merchant flag, Naval flag, State ensign, State flag |

Costa Rica (State flag)

Nov 27, 1906 | State ensign, State flag |

...

Sweden

Jun 22, 1906 | Country flag, Merchant flag, State ensign, State flag |