Diatonic Harmonica Diagram - Learn Hole Numbering and Layout #3723174 (License: Personal Use)

This black-and-white line illustration shows a standard diatonic harmonica with ten numbered blow holes (1 through 10) on the top cover plate. The reed plates and comb structure are simplified for clarity, emphasizing hole layout over mechanical detail. It serves as an educational reference for understanding blow/draw note mapping and positional playing.

Used on music instruction websites, beginner harmonica tutorials, or product pages to help learners identify holes and understand layout before handling a physical instrument. Matches user intent for visual learning, quick reference, or printable study aid.