This is a .375 H&H magnum barrel manufactured in 1951, built in the medium sporter profile.
Bluing - 95% - This barrel shows minimal bluing loss, with no significant fading or wear of the bluing.
Metal - This barrel is in very good overall condition. There is one small scuff in the metal behind the sight ramp, but no significant nicks or other forms of metal damage on the barrel.
Bore - 76/10 - The borescope reveals standard signs of rifling wear, but no pitting or significant bore damage beyond the typical wear patterns.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE