Letters on the side of the box?

[NTPD935]

Can anyone tell me what all of the letters on the side of the gun box mean?
They are: AD-SM-GW-BT-SF-SI-FC-CC?
This is on the side of a Model 40-1 Lemon Squeezer J-Frame.
I can't find them listed on the internet anywhere!

 

[racoonbeast]

I found this on line. I think that it might help.