I’m not an authenticator but I haven’t seen that bag with that liner. The article you read that has been copy and pasted all over the internet does not include any other no about the older vintage bags. I had a difficult time selling them before some of the respected people from here started a show me your vintage MK bags thread.
I have 2 that don’t have any inner tag except for one small made in Indonesia tag. The signature bags though, even in other brands rarely have a signature liner. If it doesn’t have a cotton /hemp canvas liner there should be a plastic small tag in the seam of the liner with the date code at least.