There are no rules for what makes a best gun. It's kind of like "organic." That being said, to me it means the a gun being made to the highest standards possible.
So, no intercepting safety sears, no screw-in hinge pin, no Best gun.
Top-of-the-line Greeners are beautiful, but I don't think they have intercepting safety sears.
Dicksons & McKay Browns have push-in pins. I don't know if they have intercepting safety sears.
On WR droplocks the hinge pin is part of the action. So, there's no way to replace it when the gun goes off the face.
On a hammergun, I would overlook the intercepting safety sears. They have to have screw-in pins, though.
Gold, engraving, and embellishments have nothing to do with quality. But when they do adorn a Best gun, they need to be perfectly executed.
Now I know my standards are high. But when you're talking about the best, you have to have the highest standards. That's what being the Best means.
OWD