Need Help with Identification of Barrels

[308 Scout]

I have a small lot of .44 Blackhawk barrels I'd like help identifying as I have no idea what Blackhawks they came off of and I'd like to eventually sell them. Without further adieu, here they are-

4 1/8"-

4 1/2"-

5 1/2"-

7 1/2"-

7 1/2"-

7 1/2"-

7 1/2"-

Thanks in advance for any help!

 

[contender]

The top 2 barrels are not factory length if they came off of a .44. Too short. And that 2nd one has had the front sight modified as well.
The 3rd barrel appears to be from a New Model.
The 4th barrel should be from a Super Blackhawk after 1969 & before 1977.
The 5th barrel has been modified & had the markings polished off,, OR,, it's an aftermarket one.
The last 2 appear to be New Model Super Blackhawk barrels.