c. 1950
American-type orchestral trombones become standardized throughout the world, in some cases (as in England) displacing traditional small-bore instruments. In Germany and Austria, trombones continue their independent line of development.
American-type orchestral trombones become standardized throughout the world, in some cases (as in England) displacing traditional small-bore instruments. In Germany and Austria, trombones continue their independent line of development.