I see vintage watches repaired. When the case is opened the movements are so well-designed and engineered, with gear teeth cut to the 0.1 MM level and thin, perfect jewels. How is such mechanical precision possible from decades ago?
In: Engineering
Don’t underestimate the precision of a very well trained, likely lifetime apprenticed had with a file.
Even before machine tools we were capable of training incredible precision. It just takes stupid dedication, or failing that, an indenture.
If you want to look at groundbreaking precision, look to the development of marine chronometers. Unbelievable given the resources at hand, yet they made them
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