Orchestral & Wind Instruments
Breslmair Backbore for Trumpet 8
Breslmair Backbore for Trumpet 8, Backbore, For trumpet 8, Extremely narrow backbore for soloists, Silver-plated
https://www.bizrate.co.uk/orchestralinstruments/breslmair-backbore-for-trumpet-8-oid1013072088.html