Orchestral & Wind Instruments
Breslmair Backbore for Trumpet 6
Breslmair Backbore for Trumpet 6, Stem, For trumpet 6, For wind players who need deep cups, but have little vital capacity, Silver plated
https://www.bizrate.co.uk/orchestralinstruments/breslmair-backbore-for-trumpet-6-oid1013072086.html