They are undefined lines.
Proofhouse.com has Colt sn tables you can look at.
Silent Night
silent night
Bi, Ni, Pd, Pt,Cu, Mn, Hg, Pb, Sn, Au, Ag, Zn, Cd, Fe, Sb
Many makers have sn data on line.
If the Ruger website will work for you, it has sn data published on line.
50-250 usd
This cleaning agent may be used on Al, Au, Cr, Cu, Ni, Mg, Pt, Ag, Ti, Sn, stainless steel, bronze, brass, pewter.
The chemical symbol for tin is Sn.
Your SN does not make sense. If you are talking about a BAR Mark II it should read along the lines of 107NX01001. 107=Mark II Safari, NX-=1992, 01001= the first sn of 1992
Sn=====