Logging examples to try to figure out when they began and also the numbering scheme.
It appears clear that the first two digits are the year of mfr.
First inked serial numbers occur in 2009 in the last few months of the year.
I found an example preceding that with no serial number and date stamps of September 17 & 24 of 2009.
It appears clear that the first two digits are the year of mfr.
First inked serial numbers occur in 2009 in the last few months of the year.
I found an example preceding that with no serial number and date stamps of September 17 & 24 of 2009.