Cman screwdriver question

[8man]

Is there a difference in the following Craftsman screwdrivers or just some type of factory/date code?

1/4" # 41583 AB WF
1/4" # 41583 AA WF

Then on the 1/8" screwdrivers
41589 T WF
41589 AB WF
41589 AA WF
41589 J WF
41589 G WF
41589 Q WF

I have a number of flat and Philips head screwdrivers in various sizes, and the letter extension to the number is different on the same size screwdrivers.

 

[WWheeler]

I believe WF is Western Forge
AA is a date code 2011, AB is 2012, etc

Edit: Above was off the top of my head. I looked up the ones below here:

Craftsman Hand Tool Manufacturers & Date Ranges
https://www.garagejournal.com/forum/showthread.php?t=84807

T WF is Western Forge, ca. 2002 - 2009
J WF is Western Forge 1995
Q WF is Western Forge 1990 - 1995

 

[8man]

WWheeler, thank you. I was going to move some to a "go" box and didn't want to do that if there was something special.