Interesting.
The "NOS" barrel has the sight bases and inner band mounted. It also has a five or six digit (a digit may have been struck out) number stamped on the chamber end. Looks like it suffered a bit in storage too.
The "excellent" barrel that is still partially covered with the waxy looking coating does not appear (pictures are not the best) to have a number stamped on the chamber end but it is wearing sight bases and the inner band as well.