The 1917/19 postal stationery are similar to other Yacht designs, but feature a vertical line down the middle of the card, with “Postkarte” or “Postkarte mit Antwort” centered over the vertical line.
The 1912/17 postal stationery are similar to other Yacht designs, but feature a vertical line down the middle of the card, with “Postkarte” (P16) or “Postkarte mit Antwort” (P17) to the right of the vertical line.
The 1908 Yacht Postal Stationery is a 5 Pf. card with “Postkarte” to the left side, no “An”, and a “DR 7 II” or “DR 9 II” watermark.
The 1902 Yacht Postal Stationery are similar to the 1900 Yacht Postal Stationery (P8 and P10), but can be distinguished by minor printing variations in the text.
In 1900, Kamerun began using postal stationery of the new design depicting Kaiser Wilhelm II’s yacht, the Hohenzollern II.
P9 Pr Sp and P11 Pr Sp are overprints of the proof versions of P9 and P11, with a shorter third address line (56mm vice 60mm) and a longer fourth address line (74mm vice 70mm).