The 1919 postal stationery are similar to other Yacht designs, but feature a vertical line down the middle of the card, with text in German and French.
In 1901, Marianen began using postal stationery of the new design depicting Kaiser Wilhelm II’s yacht, the Hohenzollern II.
Copies of P7-P10 “Specimen” overprints were produced for use as reference copies or examples for distribution to other members of the Universal Postal Union.
Proof printings of P8 and P10 were produced, and feature a shorter third address line (56mm vice 60mm) and a longer fourth address line (74mm vice 70mm) than the standard P7-P10.
The first postal stationery produced especially for Marianen were overprinted versions of German Empire issues.
Beginning in 1905, Germany began phasing in the use of watermarked paper on its new issues.