Looks like a polished and custom etched valve.
I wouldnt pay extra because of the valve.
Its just a classic valve.
Hey, that's better than the 2nd born, nice move!!!
And to vintage's comment above, who cares that they only did 6 lightning anno jobs that
You can't see them clearly through the Fire JD & cigar smoke. The 2nd & 3rd types of lube best used in mags