Button cell no expiration date

The Knofzelle is supplied in a plastic bag without an expiration date. The delivery took 4 days long.
The cell has an open circuit voltage of 3.04 V. In a new lithium cell 3.2 to 3.4 V are normal. So I'm assuming that it is stored for years and in my kitchen scale by holding only a few months.
If, nevertheless more than one year doing their duty, I will enhance the cell in my review of course.