Guilloché

Heres a pretty neat pattern set i stumbled across. Guilloché patterns were originally made on complex clockwork lathes in the 1500's. The designs were wildly popular in the golden age of the 1920's an 30's adorning everything from wristwatches to automobile engines. This technique was also used to make the famous Fabergé eggs.

Here is some variations on just one set, there are hundreds of different families of designs out there that I have yet to crack.