You find a gunsmith who does blueing and let them do it.
You will have to call Colt with the sn to find out
no
open the cyl and number is on the frame
Revolver or semi-auto?
Around 1921 for a 1903 colt hammerless .32 with that serial number.
Proofhouse.com has Colt sn information.
Yes.
about 1922
made about 1915
The original color of the Colt .32 pistol model 1908 was typically a blued finish, which gave it a deep, dark blue-black appearance. Some models may also have featured nickel plating, providing a shiny, silver-like finish. The blued finish was standard for many Colt firearms of that era, emphasizing both aesthetics and corrosion resistance.
It would be 90 years old. If it is a Colt 1903 hammerless .32 , it was made in 1921.
You must call Colt to find out.