The "H" is used for a sHeepfoot blade although that blade does resemble a hawkbill to a degree. So many of Case's blade designs started with an "S" (not to mention "SS") they used the second letter in the blade type to stamp with the model number.
True but the sheepfoot was only designated by the "H" when it was on a stockman pattern that had the spay blade to avoid confusion.
On other knives the sheepfoot blade was designated as "SH" like on the 11031 SH.
Technically on the 62031 LHR they should have used the designation "P" for "Pruner" blade instead of "H" for "Hawkbill" since Pruner is the correct name for that blade style.