You must contact SIG to find out.
Could be Sauer, Schmidt, Rohm, RG, Gecado, or any of a dozen others.
Could have been Erma, Rohm, RG, Sauer or any of a half dozen others.
Check the frame
Need to know model number and condition.
You will have to call Sig Sauer to find out
It was proofed in 2006
It was proofed in 06
1998 or so.
You will have to call SIG to find out.
8 yrs old
No published sn data.
You will have to call SIG