greg once wrote:
For Quantegy tape the date code is a 5 digit number that starts off with the last two digits of the year then the day number
Example:94172
The 94 means 1994
the 172 is means it was made on the 172nd day of that year.
For Emtek the date code looks like this SM 2900 B 09 27 027
SM 2 (2" tape) 900 (type of tape) B (?) 09 (last digit of year so 1999) 27 (week of production) 011 (jumbo roll code).
I don't know why they don't say "99" for the year code. Sometimes they will just have the last digit.