There are different types of label created by Nike. From what I have seen U.S, Canada and Australia have their own MSRP. The pairs from the EU don't have an MSRP. I believe pairs from Asia don't have an MSRP either.
Here is a Canadian label:
Here is an Australia label:
The stamp is not a tell. All pairs do not have the stamp, but in my experience most do.
The stamp for Men's Jordan 1's made in China is usually an 8 digit code that can have a 'B' in front and/or a 'N' in the back. So the format is either BXXXXXXXXN or BXXXXXXXX or XXXXXXXXN or XXXXXXXX (where 'X' represents a number) and sometimes there may be missing numbers or letters because the box is not properly stamped.
I don't know exactly what the B or N stand for, or every digit in the stamp, but six of those digits should represent the date that the shoe was completely packaged.
For example this pair was packaged on June 10th 2019:
While this pair was packaged on April 26th 2019:
*Note that not every stamp will follow the MM/DD/YY format, I have pairs that don't, it depends on the person that stamped the shoe and how they configured it.
More recently, Pairs can come with a Nike Swoosh stamp like below:
*Travis Scott 1's can have either a swoosh or the code as the stamp.
Men's pairs made in Taiwan are different. From what I have seen so far they are only 8 digits, the stamp can be in red or blue and the font is larger.
Here is an example below:
Packaged on 1/15/19
The stamp is typically found on the box lid, but it can also be inside the box.
Jordan 1s in GS sizes also use a different format.
Packed on 5/3/19