Movement decomposition picture

it trouble me for a long time, i have never seen 1071&1072 caliber decomposition picture.i find a pic, is too small to see clearly

 i want to figure out how the power is stored in the spring box. What is the structure of the chain? thank you

the power comes from the mainspring which is placed in a
04/27/2016 - 09:35

circular component called the barrel

 

the power comes from the mainspring which is placed in a