Harmonica Diagram - Learn the Structure of a Diatonic Blues Harp #3723187 (License: Personal Use)

This technical line drawing depicts a diatonic harmonica, featuring ten rectangular air holes aligned along its body, two circular screws securing the cover plates, and a streamlined rectangular casing. The top and bottom cover plates are shown with slight curvature, indicating typical metal construction used for resonance and durability. The perspective highlights both the front-facing holes and side profile, useful for understanding breath direction and ergonomics.

Used on music education sites, instrument repair guides, or product pages to illustrate harmonica anatomy; matches user intent for learning parts, identifying models, or comparing designs.