I was given some rod blanks this past weekend, and one has markings indicating that it is a Fenwick HMG GFL 75-4. I've determined only that this means it is a graphite fly rod blank, 75 inches long, 4weight. I'm curious about the ferrule on this rod, which appears to be a thicker area of graphite at the base of the tip section. This thicker part is a few inches long, and ends in a sharp, angular taper, which is something I've never seen before.

Can anyone tell me more about this blank, possibly how old it may be, and critically, how do I do the wraps on the ferrule?

I'm really looking forward to building this rod for some small stream fishing.