Cameroon 1902, British 1-d postal stationery postcard with overprint Niger Coast Protectorate, reverse one-line postmark "company north-west Cameroon" and legitimate text, from Old Calabar 14. 8. 02 to Frankfurt / Main, arrival cancel 13. 9. 02. the postal service of the unzugänglichen German north-west Cameroon could at that time only over the British post in the neighboring Nigeria warrants become.