I'm not voting...I'm just adding a historical note...as no one has mentioned it so far
.
I thought Griefelt engineers made a special point of setting the high water mark in the 1930's, by copying the best British sidelock known, combined with the most luxurious materials selection and heat treating processes, using alloys generally not available to the British. It became a national pride sorta thing to showcase the Germans world leadership role in metallurgy...I don't think many were made...and many German collectors prize them above anything British (like Kuchenreuter)