I have seen Henry's labeled as Henry 1 to Henry 6. Jaw widths are like Records. 1 = 3inch, 2 = 3.5, 3 = 4, 4 = 4.5 inch, 5 = 5 inch, 6 = 6 inch. The swivelled versions have the name "Bulldog" on the brass wrench for the swivel. I have seen Henry's labelled 35 to 60, with the Henry name...