Which as you know is fairly uncommon on the 6" barreled 27's which almost always sport a Patridge front sight. The Baughman is very common on the 3.5", 4" and 5" 27's (and pre-27s), and still fairly common on both the 6.5" (probably more than half of them) and 8.375" (probably 10% to 20% of them, depending on era).

Do you know if the yellow insert came from the factory?

__________________
Richard
Engraved S&W fan