Refinished - original Brazilian Contract and genuine WWI US-issue were commercially blued - this has been Parkerized, or bead-blasted and blued.
Replaced grips - originals are checkered walnut, with 'diamonds' surrounding the screw hole.
Replaced lanyard swivel - originals were casehardened.
Someone cleaned this up quite a bit.
That said, the things to worry about will be bore condition (they shot a lot of corrosive) and timing.
If the bore's pitted, jacketed Ball will work well, and unlike Colts - S&W parts are readily available.
Scouts Out!