To me, it looks like a 3" SB model 60.
The blue on the cylinder and the cylinder release nut look like Duracoat.
Notice how thick it looks. Looks like it has built up and softened the appearance of the cylinder flutes.
The hammer and trigger look like flash chrome.
The cylinder release looks like white paint or Duracoat.
Gun painters should never be allowed near nice guns.
If I bought this gun, I'd strip that garbage off of it.
Don't get me wrong, I like Duracoat if it's done correctly.
Durafil and Duracoat can be used on a ratty, pitted gun to make it look good again, if it's done in flat black or gun blue.
On a gun that was originally painted from the factory (CZ82/#4Mk2 SMLE/many AKs/etc) it is a great way to restore a worn or damaged finish.
This is not one of those cases.
Friends don't let friends paint nice guns.