The quartz movement in battery-powered watches is plated with gold and trimmed individually using laser to achieve a vibration frequency of exactly 32,768 Hz to keep time accurately.
The crankshaft in pistol engine is adjusted by hand or computer to make sure the center of gravity is in the middle of the shaft for smooth rotation.
The 50 ohms resistors on an impedance standard substrate for high frequency measurements are laser trimmed as well for ultimate accuracy.
Therefore, does each individual CPU get calibrated by any means before being shipped? I would imagine the answer to be yes as CPUs are intricate products that should require some tweaking. But how is CPU calibration done on a hardware level?