Gillette Stainless Steel Blades (what years)

[DonLafontaine]

I recently purchased a pack of these and there appears to be a code that begins "K06(unidentified digit)." Anyone know from what year or years are these blades? Thanks, Matt

 

[mmack66]

I have one of these and there is a date code on the blade just like the razors have. Mine is an L2.