Snap-On Naming Scheme TWM13A

[gumbudah]

Hey there. I'm looking for a 1998 Snap On 1/2 drive 6 pt 13mm sshallow socket. I think the others in the group are TWM. I found one on ebay but the part number says TWM13A where I would expect it to just be TWM13. What does the A mean?

 

[Skin]

letters after are revisions. Could be as simple as a small cosmetic change to the socket wall or font.