The "trikitixa", "triki" or "trikiti" is a two-row Basque diatonic button accordion with right-hand rows keyed a fifth apart and twelve unisonoric bass buttons. More info: https://en.wikipedia.org/wiki/Trikiti.

Appears all along Kepa Junkera's works and collaborations, like this:

• A irmandade das estrelas
• El mirlo
• Pica de bodas
• Seguidillas madrileñas
• Toque de teatro