How to check the originality of the chip STM32F407VGT6

[veditor]

Hello. I purchased two STM32F407VGT6 controllers from different sellers. Later, I noticed that the markings were different. Is it possible to determine the originality of the chip based on the markings? The absence of the ARM label is alarming, and the VGT6 parameters have the number 6 on a separate line.

[Uwe Bonnes]

Why did you post only the photo of one chip?
However for me the marking of chip on the picture looks fine.

[Andrew Neil]

Have you got a photo of the other chip?

Were the sellers Authorised Distributors ?

[veditor]

This is the second controller, and it seems more "original". This is not an authorized distributor, but a private seller, but they claimed that it was the original. I have not yet tested it in operation, but I will do so later. However, I am curious about the reasons for the differences in labeling.

[TDK]

It's probably genuine. If you're concerned about getting genuine parts, stay with an authorized reseller. There isn't a parts shortage, these are in stock and available.

 

Markings change because manufacturing plants change and maintaining 100% consistent markings over decades is not a priority.

These chips were made 3.5 years apart from the date code.

[Andrew Neil]

Here's the two, side-by-side:

  

I think the one on the left is a newer marking scheme?

[Uwe Bonnes]

Datecodes '533' and '211" may be 13 years apart, so expect some variance. Readout the UID of the chips and try to decipher the UID with the rules given for some devices 
https://community.st.com/t5/stm32-mcus/how-to-obtain-and-use-the-stm32-96-bit-uid/ta-p/621443

and try to see if there are many batches in between...

[veditor]

Thanks for the clarification. I will try to solder both of them. I will report the results later.