Is that the actual box for that pistol??
Is that the 4 digit code to the immediate right (end) of the serial number printed on the box label (which presumably matches your pistol
)?
My original 4513TSW has a TDXXXXX serial number and it was made back in 97-98, if I recall. That was back when the original 4513TSW's had no frame rails, had the front/bottom of the grip frame cutaway and used 6-rd magazines.
The 7-rd magazines started being used in the TSW when the frame rail version was introduced.
Dunno know when yours was produced. You might call the factory and ask.
Congrats on finding a 4513TSW, though. Mine's gone through a lot of rounds. I just replace the dual recoil non-captive springs periodically. Nice gun.