Belgium - 1915/16, 4 highly decorative covers with collector's frankings,

Belgium - 1915/16, 4 highly decorative covers with collector's frankings, each as registered mail to an address in Switzerland, while bilingual postmark 'Poste Belge - Belgian Post', including three times (including once as a pair) issues of the Red Cross 1915 (Michel numbers 110/112), plus other definitives with the likeness of King Albert I. A letter additionally AUsgabe 1912 (Michel numbers 89/99) with decorative fields on cover!