The four German - built ships were completed in 1912 .
The four German - built ships were delivered that year , but the four British - built ships were purchased by Greece in October 1912 because of the First Balkan War , becoming the Aetos - class .
The four German - built ships were completed in 1912 and delivered that year , but the four British - built ships were purchased by Greece in October 1912 because of the First Balkan War , becoming the Aetos - class .