vintage sax
vintage sax

New Dörfler & Jörka (D&J) research/page

This entry is part 1 of 1 in the series Dörfler & Jörka Saxophones

I am very pleased to unveil the newest in my 2026 research: the analysis of the Dörfler & Jörka (D&J) data I published earlier this …

GebrM for JK large MOP key touches

This entry is part 2 of 4 in the series Keilwerth Saxophones

Julius Keilwerth saxophones are known for many things: their huge sound; big bells; accurate intonation; sturdy build; longevity; and big MOP key touches. But something …

Hammerschmidt octave patent

Originally published in 2024. Updated March 2026 German patent application Background Summery Figure 1 Figure 2 Patent claims Photos of Hammerschmidt octave vents 1961 Hammerschmidt …