However, what I do have for you is a shot of the above machine, which is used to take the raw wire (of an alloy whose composition is closely guarded) and make it the right thickness for various types of hairsprings (again, the diameters of which are top secret). The wire is passed back and forth between the spools, going through circular compression tubes in between. Each pass stretches the wire about 15% and thins it in the process. The wire you see here started at .6mm and will eventually become thinner than a human hair after multiple trips through the machine. From here it is cut and shaped into the final springs (if I'd even asked to shoot photos of that, I likely wouldn't be here to share the tale with you today).