Bell Diameter is 11 1/2, bore is .715″ & the instrument’s height is 34 1/4.”
“GEBR. ALEXANDER / HOLZ & METALL / INSTRUMENTEN – FABRIK / in / Mainz” on seal on bell. There is floral engraving on the seal and rotary buttons. No serial number could be located on body of instrument.
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https://simonettitubacollection.com/ins ... -4-rotary/