Modern high security combination locks are digital, the rotation for each number is random. http://www.kaba-mas.com/kaba-brand/products/906098/x-10.html http://

Modern high security combination locks are digital, the rotation for each number is random. http://www.kaba-mas.com/kaba-brand/products/906098/x-10.html http://www.kaba-mas.com/kaba-brand/products/906098/x-10.html However the S&G electromechanical is direct dial, so would be susceptible. http://www.sargentandgreenleaf.com/products/electronic-locks/model-2740b/ http://www.sargentandgreenleaf.com/products/electronic-locks... However people usually open locks with their dominant hand, and wear their watch on their non-dominant hand, so it seems to be a small risk overall.