Watch List notes:

GERMAN EAST AFRICA. 15 Rupien, 1916-T. Tabora Mint. Wilhelm II. NGC Unc Details--Removed from Jewelry.
Fr-1;KM-16.2. Mintage: 6,395. Variety where the arabesque ends below the first "A" of "OSTAFRIKA". Tabora Emergency Issue. Retaining much of its originality and luster, this example is quite attractive and also displays sharp details.

According to A Monetary History of German East Africa by John E. Sandrock, this issue was also knows as the "Tabora Sovereign" as it was created to compete with the British traders using the Sovereign on the African coast. They were struck from minting equipment salvaged from the Konigsberg and was ran by four men that were recruited from an engraving shop. To help expediate the process, the design was engraved directly to the dies they intended to use, instead of a master die, as is customary. Likely due to crude stamping machinery, the first die broke, thus the need for a second die. This gives us the two varieties. The earlier die has the arabesque of the wing end under the "T" in "OSTAFRIKA". Where as the later die it is under the "A".

Estimate: $2500 - $3500