johnr:

The forend irons were usually serial numbered to the gun, possibly a Numrich NOS replacement....?.......It would be easy for you to polish and blue the forend iron if you chose.....at which time you could serial number it as well.....or send it out and have it blued and numbered.......or just leave it as it is..........

Any way you slice it John, that is a beautiful gun and as mentioned, you will get many years of pleasure from it's use....

Cheers,

Doug