How to know when does the Hypertherm parts produced ?

How to know when does the Hypertherm parts produced ? This is a small interesting quesiton: There have a 5 number on the parts.Let Show Hypertherm electrode 120926 as example. In the below picture the 1st electrode was produced at the 4th of 50th day of  .2007 the 2nd electrode  produced at the 2nd day of 42th […]