SX90R straight alto with engraving typo
In this day and age of knockoffs and counterfeits, we should all be leery if any item we are thinking of buying doesn’t quite look …
julius keilwerth
New Dörfler & Jörka (D&J) research/page
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
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 …
Is a bass sax right for me?
Originally published Dec. 2024. Updated Mar. 2026 Over the past few years I have lost count the number of times I’ve seen posts online saying …
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 …
Beware: Fake Keilwerths made in China
Originally published in 2021. Updated in 2026. 2026 Update Info Definitions Consequences Fake Keilwerths Fake Shadow Tenor Compare & Contrast Necks Front Views Left Hand …