following shows the structure of an overblow-harp :
- - - - - Eb Ab C Eb F# Bb OVERBLOWS C E G C E G C E G C 1 2 3 4 5 6 7 8 9 0 SLIDE BUTTON D G B D F A B D F A Db F Ab F# OVERBLOWS - -
picture shows a C-Harp with its Overblows, Slide button supports the marked "-" overblows.
the overblow harp was developed by prof henry t. bahnson in pittsburgh . it seems to me hohner lost interest to push it, so they gave it in the hands ove that store i mentioned in march probaly . it is available in C, F, G each priced 160,- DM and it is said, that it makes it ieasier to learn the overblow technique ...