Description

1917 (Dec ) Plain envelope to Zurich bearing Zambezi 50r tied indistinct date stamp & with circular black Passed By / 99 /Censor hand stamp & French Controle Postal Militaire label tied black oval Ouvert / 912 /Par L’Autorite Militaire hand stamp & on reverse Zurich (29 Jan 18) arrival cds…………….. Ouvert 912 was one of the French censors in London responsible for mail in transit from neutral ships to Switzerland…..Scarce commercial usage