Kamerun Gruss aus Kamerun Private Postal Stationery Fr PP1 F 1 (front) Fr PP1 F 1 (rear) Fr PP2 F 1 (front) Fr PP2 F 1 (rear) In March 1898, private versions of the 1897 Overprint Postcards became available for use. Set Date(s) March 1898 Gruss aus Kamerun Private Postal Stationery Fr PP1 F 1 (front) Fr PP1 F 1 (rear) Fr PP2 F 1 (front) Fr PP2 F 1 (rear) In March 1898, private versions of the 1897 Overprint Postcards became available for use. Set Date(s) March 1898