How to Check the Production Date on Car Window Glass?

[LeAutumn]

Here are the methods to check the production date on car window glass: 1. There is a code at the bottom left or right corner of the window glass. The last or second-to-last row contains a number and several small black dots, which indicate the production date of the glass. 2. If the small black dots are in front of the number, subtract the number of dots from 7; if the small black dots are behind the number, subtract the number of dots from 13. The result is the production month of the glass. 3. Some glass may have a few larger black dots after the production year and month, which are used to specify the week of the month.