My 425 High Power (#4837) has the same front & rear sights as posted by GeneB and they appear to be original to this gun.
My barrel is original and has not been shortened. While it is not crowned, the outer circumference at the end of the barrel has an about 45% chamfer, and the inside circumference at the beginning of the bore, at the muzzle, has a slight chamfer also. I would think that a cut barrel might not have these finishing touches.
