As the Martin Guitar Company approaches its three millionth guitar, this first-ever Martin repair guide details the significant changes over 190 years of production. From the early 19th century small shop builds to the current advanced technological robotics, authorized service technician Patrick DiBurro explains how to identify the evolving joinery and materials. With over 25 annual trips to train in the Martin Repair Department, he explains the timelines of production changes and many of their procedures with photos and detailed steps. This is a must-read for anyone involved in the repair trade and those considering the occupation. While Martin Guitars through the decades may appear similar, many construction methods have been revised, requiring an understanding of the evolving technology. This essential guide will provide you with the tools you need!