The New Bassic Sax
The New Bassic Sax Blog

Keilwerth’s 100th Anniversary SX90R

This entry is part 1 of 3 in the series Keilwerth Saxophones

Intro Keilwerth’s Description Model Designations Numbers Produced Features Necks Cases Info from JK Website Technical Specs Brochure Page Backstory Concept Considerations Process Timeline Videos P.S. …

GebrM for JK large MOP key touches

This entry is part 2 of 3 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 …