Today I received this little box in the mail. Price total came to $51 including shipping. Not too bad.
Overall, they’re in pretty good shape. The PS513 in the middle is one purchased back in 2015. (That is when I first discovered the pencil’s existence).
Disassemble one of the pencils n you find a metal lead reservoir w/o stamped manufacturing date.
Since there is no date on the lead reservoir, is there a way to know its age through the manufacturing number on the box or no?