Thanks for the input s&wchad ... but does the H mean "Highway" ?
Yes, mine is a Highway Patrolman ... and it is interesting ... but the cylinder itself does not look like a nickle over blue job...but I could be wrong.
The metal handle part of the frame has what looks like was a capitol N stamped into the bottom end of the left-hand side... but it looks like a previous owner did some rubbing on this area of the metal handle so only the second and third stem of the N remains.
What also gets me is that there is no "star" indicating a factory rework.
The gun has an S serial number, and is marked 28-2...so it's an early 28-2
If you can point me to how to include photos in a post, I'll try to get some photos added.