Netherlands: 1916, postage exemption label in green used on cover (backflap miss
Netherlands
1916, postage exemption label in green used on cover (backflap missing) bearing violet oval ""INTERNEERINGSDEPOT HARDERWIJK" and postmark 7.11.16, alongside "PORT VRI / FRANCE DE PORT / Militaires etrangers / Internes dans les Bays-Pas", addressed to (German occupied) Belgium and returned "Zurück weil...