How did they made these ...in XVI century?

[kb4mdz]

Give artisans and craftsmen plenty of time and the results can be incredible.

....

Give a troop of humans some hammers, chisels and files, come back in a few years, and voila, there's a locomotive.

39 years I once worked at Stromberg-Carlson in Charlottesville, VA. Their chief plastics molding engineer was an old coot named Hasenauer, and had worked his way literally up from toolroom apprentice. He knew both toolmaking, & plastic injection molding backwards and forwards.

His words about toolmaking: "You gather 3 German toolmakers and a keg of beer around a block of raw steel and you will see MAGIC!!!"