You own an old guitar and want to know more about it? We offer expertises for CHF 100.- per instrument in which we meticulously check every detail of your guitar. You will then receive a certificate personally prepared and signed by the shop’s owner, Patrick Geser, attesting to the guitar’s condition, authenticity, and current market value. This certificate is of great value for private sales, for insurance purposes, or to frame and display next to your guitar.