The system using Hexadecimal numbers where the first 2 characters are the last 2 digits of the year and the remaining characters encode the month and day (i.e. 5A399, 5A = 90, 399 = 921, so the date is 9/21/90).

The system using 6 digits encoded yearmonthdaydaymonthyear (i.e. 001976 = 7/19/06).

Some older reloads actually had the date and year stamped on the instruction sheet.

However I have a bunch of reloads with codes like this 05121009 and 03081007. Does anyone know how to interpret these? I suppose it could be monthmonthdaydayyearyear with the last 2 digits being a code for something other than the date. Does anyone know for sure how to interpret these codes?

Thanks.

Jonathan