Discussion with BOSCH Technical Team
I had a very good discussion with the BOSCH technical team regarding the above-mentioned subject. I had sent some pictures to BOSCH, which I downloaded from the internet, but they do not show the expiration date (See the attached).
Below is the reply that I received from the manufacturer. My understanding was that every cutting/grinding disc should have a validity.
Reply from BOSCH:
"Our Bosch product does, in fact, have the expiration date embossed in the center of the wheel. I understand that it's very difficult to see in the picture. When I enlarged the photo you sent, the date is pressed into the center white ring at about a 2:00 position."