German 1930's Hohner Harmonica, 'Harmonette' Harp-Shaped

Original era manufacture. German manufactured Hohner harp shaped harmonica. Still plays well, missing one small nail on right side of the frame. Measures 4.75 x 3 inches. I believe this is in the Key of C. Looked up the US patent information, and the number range for 177667 shows up between 1929 and 1930.