above pics are some of the displayed locks. most of them are lever and warded locks using plate spring. you may easily find out how it works.
some huge locks. these locks were as big as my forearm.
ancient multiple dial combination locks. Chinese characters are carved on each dial instead of numbers.
old hand-powered key copying machine.
there were locks from Japan, China, Indonesia, Vietnam, Nepal and Tibet, but there was not any special difference in lock mechanism.
few years ago i read a news article about some ancient Korean locks has hiding/shielding keyhole by puzzle mechanism, but i can't find lock like that in this museum.
Have seen a number of those lock designs, even have one like the second picture. 
