Alex Hamilton’s sixth lesson covers the “muscles” of the watch: the power train. He explains how power is transferred and amplified from the mainspring barrel through the center, third, and fourth wheels, eventually reaching the high-speed escape wheel. The tutorial provides a detailed, step-by-step guide on installing train bridges without bending or breaking the microscopic pivots, emphasizing the use of light pressure and patient alignment. Hamilton also demonstrates how to create a simple, effective handmade probe using a sewing needle and peg wood to assist in seating pivots during reassembly.
