sentences:  The vast majority of Model 1902 pistols were produced with a highly polished, deep and lustrous Colt Royal blued finish, but rarely nickel and silver plated models are encountered, as well as various custom finishes.On some early production Model 1902s the trigger, pins, and grip screws were set off with a fire or nitre blued finish, giving those parts a beautiful cobalt blue hue.The hammer of 1902 pistols usually had a case hardened finish.