• German and Czech Makes & Models / Julius Keilwerth / Horns Pre-1990s / Stencils / H-Couf / Superba I / Bari / Baritone #63310 (low Bb) Baritone #63310 (low Bb)
  • German and Czech Makes & Models / Julius Keilwerth / Horns Pre-1990s / Stencils / Evette / Alto Serial # ? Master Model Alto Serial # ? Master Model
  • German and Czech Makes & Models / Julius Keilwerth / Horns Pre-1990s / Stencils / Richard Keilwerth / Made by ? / Alto Serial # ? Solo Model Alto Serial # ? Solo Model
  • German and Czech Makes & Models / Julius Keilwerth / Horns Pre-1990s / Stencils / Richard Keilwerth / Made by ? / Alto Serial # ? Alto Serial # ?
  • German and Czech Makes & Models / Julius Keilwerth / Horns Pre-1990s / Stencils / Richard Keilwerth / Made by ? / Alto #1585 Alto #1585
  • German and Czech Makes & Models / Julius Keilwerth / Horns Pre-1990s / Toneking Solo / Alto Serial # ? Alto Serial # ?