German East Africa 1919 Yacht Postal Stationery Ei P26 (front) Ei P26 (rear) Ei P27 (front) Ei P27 (rear) The 1919 Yacht Postal Stationery have a vertical line down the middle, with “Postkarte” text centered above the line. They also are not watermarked. Set Date(s) 1919 1919 Yacht Postal Stationery Ei P26 (front) Ei P26 (rear) Ei P27 (front) Ei P27 (rear) The 1919 Yacht Postal Stationery have a vertical line down the middle, with “Postkarte” text centered above the line. They also are not watermarked. Set Date(s) 1919