How to Identify the Production Date of Car Windows?

[Robert]

Identifying the production date of car window glass can be done as follows: 1. The production date of car glass should be earlier than the vehicle's manufacturing date. Currently, there are generally three representation methods for car glass production dates. 2. Covering over 80% of the market share, this date representation method consists of small dots and numbers, where the numbers represent the production year, and the dots represent the month. 3. There are two differently shaped dots to the right of the number. The dots following the number vary in shape, requiring careful differentiation by car owners. 4. This representation method can specify the exact day. The numbers still represent the year, with two rows of dots to the right of the number. The first row of dots represents the month, and the second row consists of two differently shaped dots. The first type of dot represents N days (1 dot), N+10 days (2 dots), or N+20 days (3 dots).