The overprint issues used throughout the German colonies were replaced in 1900/1901 with a standardized design, featuring Kaiser Wilhelm II’s yacht, the Hohenzollern II.

The 1901 Yacht Issues can be distinguished from subsequent Yacht Issues by the units of currency and the watermarks:

1901:  Pesa/Rupien values, no watermark
1905:  Heller values, no watermark
1905/1920:  Heller/Rupien values, lozenge watermark

Plate flaws of several issues exist.  Among these are plate flaws of the 5 Pesa, 10 Pesa, and 20 Pesa issues.

The 3 Rupien value can be found with a printing error, a Type III frame with a Type I center.  For a description of these types, see here.

For proofs and essays of these issues, see the 1901 2 Pesa Proof and 1901 Color Proofs.

The Rupien values can all be found with the same plate flaw, retouching in the clouds above the bow of the yacht.

The larger format Yacht Issues of the German Colonies have slight differences in color, perforation, or frame/center types. For a detailed description of the frame/center types, see the guide to Colonial Frame & Center Types.