If a piece of jewerly bears the SN mark stamp one is reading it upside down. The mark stamp actually says NS. NS means that the jewelery is made from gold, silver and nickel, where nickel and silver are the base metal.
The "SN" stamp on jewelry typically stands for the metal purity, with SN representing 925 silver (92.5% pure silver). This stamp assures the buyer of the authenticity and quality of the metal used in the jewelry piece.
I think it's probably NS rather than SN (it can be read upside down or right way up!) It signifies it is a rolled gold necklace (ie a form of gold plated necklace) with the base metal being a mix of Nickel and Silver.
Could be part of the sn, could be an inspector mark
No published sn data
a part of the sn
Part of the sn.
Have you checked the metal under the wood?
You can't tell who made it by the sn. It should have a name on the barrel
No published sn data I have seen.
Ruger's web site has sn tables.
Published sn data does not cover this sn. You will have to call Colt.
my reference for the commando model shows SN 1 thru 50617 made between 1942 and 1943.