I ran into a Romanian SKS and other than a non numbers matched bolt it is an otherwise totally numbers matching rifle.
EXCEPT the stock has an anomaly,It has the serial number stamped correctly in the correct place and in the proper size font,BUT,it also has another serial number from an earlier serial number rifle in much larger font stamped on the stock horizontally right by the vertical matching number.Seems kinda strange to me.
All I can figure as a reasonable explanation is maybe the arsenal or armorers disassembled several rifles at once and put a different rifles bolt in my rifle and then placed my stock on a different rifle when they assembled it,put my stock on another rifle and stamped that ser.# on it so it matched.When they discovered my rifle was still there they switched the stock back to my rifle? Sounds funny,but it's about the only reasonable explanation I can come up with.