Here is what I do know...
Model 10-6. Low number "d" serial.
5" barrel, I think it's a heavy barrel.
Serrated trigger, hammer has "pyramids" or whatever you want to call them, it isn't smooth, they're case hardened.
The gun seems to be nickel plated. Except the top of the barrel has a satin finish, almost like a satin stainless. It is definitely not polished, nor is the finish an aftermarket refinish.
It is clearly stamped "10-6", but this nickel look with a brushed stainless appearance along the sight line is confusing me.
It isn't a brushed line, the entire top of the gun looks like brushed stainless, from sight to sight.
Is that normal?
Thanks in advance