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