PROJECT 91
“ WHAT WE’ RE REALLY DOING IS TAKING EVERYTHING WE BELIEVE WE KNOW AND ASKING: HOW FAITHFULLY CAN WE RECREATE WHAT WAS BUILT BACK THEN?”
A serious tourbillon watch clears a quarter million because you can open the case back and point to where the money went. The rotating carriage alone holds seventy or more components, many weighing less than a gram, each shaped, fitted, and assembled by a specialist trained to work at that scale without distortion or error. The balance is usually free-sprung, tuned by adjusting inertia screws around its rim rather than relying on a regulator that can drift with shock or age. Regulation happens across positions, sometimes across temperature ranges, with tolerances measured in seconds per day and expected to hold for decades. The finishing supplies physical proof of time spent: anglage cut and polished by hand, including interior corners that machines leave rounded; steel parts brought to a true mirror polish; jewel sinks cut cleanly to reduce longterm friction; surfaces striped, grained, or frosted for functional reasons as much as aesthetic ones. Cases arrive in platinum or gold, metals chosen as much for density and workability as status. Some dials come from enamel, aventurine, stone, or sapphire— materials selected precisely because they complicate the process. When the watch ships, it carries all the requisite documentation: reference number, caliber, movement number, and other materials that lets a future owner understand exactly what sits inside the case fifty years on.
Project 91 guitars occupy the same ground when Martin treats the acoustic structure with equal specificity and uncompromising materials and craftsmanship. Carrying a $ 150,000 price tag, each instrument traces back to a particular prewar D-45 by serial number, giving the build a fixed reference rather than a generalized“ vintage era” target. The work that supports the price begins where conventional manufacturing repetition ends and judgment takes over. Wood enters the process through response rather than category: stiffness relative to mass, grain orientation, long-term stability. Bracing gets shaped by hand, adjusted by ear, and brought into balance with the top rather than fixed into a template. Finish thickness becomes a measured variable, controlled because it alters mass, damping, and
78 | SPRING 2026