Follow-up to fake or real chips? I think I know the answer now.

Follow-up to my previous videos about possible fake chips from AliExpress. I think I found the answer to the question on what was up with these chips!
Part 1: • Basement Rant: Did I b...
Part 3: • My first PCB! A Tandy ...
Part 4: • Viewer mail: All-in-on...
Video on the jr-IDE installation in my IBM PCjr
• IBM PCjr Part 4: It's ...
Jonard Tools EX-2 Chip Extractor:
www.jonard.com...
On the chips I bought:
Alliance AS6C4008
-55PCN 1635
I246219J0152G