And here's some info on the weights (I said they looked heavy!)

No.1 horn weighs 25 1/4 lbs             white
No.3 horn weighs 19 lbs                  white
No.5 horn weighs 16 1/2 lbs             white
No.2 horn weighs 23 1/4 lbs             brown
No.4 horn weighs 20 lbs                  brown
No.6 horn weighs 16 1/4 lbs             brown