I just bought a 520 and it all appears to be correct according to the research I've done here and a few other sites, HOWEVER I understand that the buttstock should be seriaized to the gun. I can't find a stamping on my buttstock. Where should it be or I misinformed? BTW, the SN is 69,633.
Also, mine has a JC Higgins buttplate. What do you think; is the butt plate wrong? What should an original buttplate look like and where could I find an original?