I believe colt introcued the 38 in 1886...................so, yes for 1903
Single or double action revolver? Semi-automatic? Caliber? Without these pieces of information, can't help you.
if a single action made about 1903
Disappearing Gun in Action - 1903 was released on: USA: January 1903
Torpedo Boat in Action - 1903 was released on: USA: January 1903
Battleship 'Indiana' in Action - 1903 was released on: USA: November 1903
German Torpedo Boat in Action - 1903 was released on: USA: 1903
Fireboat 'New Yorker' in Action - 1903 was released on: USA: May 1903
Seattle Fire Department in Action - 1903 was released on: USA: February 1903
You have to give up a little more information than "1903". Manufacturer, type (pistol, rifle, shotgun), type of action (revolver, pump, lever action, bolt, etc) as a minimum are necessary.
The Big 4-7 Gun in Action - 1903 was released on: USA: January 1903
About 1903.
I found it myself. It is a S&W model 1905 third change double action revolver. Manufactured between 1903 and 1917.