Cut down shamshir?

[ALEX]

The daggers with signed blades are quite rare, and most are formed from the cut down shamshir blades. Can this be taken as a proven fact? We can assume that the broken shamshir blade could have received a new life in a form of a dagger/kard, etc. in the past, but could the dagger/kard be originally created with the signed blade, just like shamshir would? Most interestingly, is there a way to tell:-)?
Below is an example of a signed in true gold inlay (AssadUllah+Shah Abbas Safavid) kard with the heavy 10''+ long and 1.25 wide laddered/Kirked Nardubanned:-) wootz blade. I know that most of us will assume it used to be a shamshir, but would love to hear some arguments/opinions.
Thanks to all!