Treasure Hunt 3

CAMEROONS -BRITISH MANDATE--Douala 1941 Registered cover sent from Victoria to Douala, franked with 3d, pair, KGVI tied by "VICTORIA - CAMEROONS * BRITISH MANDATE 6.10.41" cds. Alongside British red censor mark and French "CONTROLE POSTAL*Commission A/TERRITOIRE DU CAMEROUN" handstamp & Nigeria censor Roughly opened by Censor at left. Unusual.