For quickie dating, the three most useful things on a box are: Dating means putting the box in the correct historical period, not learning the exact day it left the factory, though that too is sometimes possible. Each of these topics is detailed elsewhere in Hyman’s Car History Museum. Add the last two numbers of the Series to 1930 and you’ll know the date. Intended as a warning to tax cheats who reused stamps or boxes, starting in 1868 a “Caution Notice” was required to be pasted on a car box. Newark NJ By entering this site you declare you are 21 or older, you read and agreed to its Terms, Rules & Privacy and you understand that your use of the site's content is made at your own risk and responsibility.