Thanks Spoonplugger and Panfisher. That helps me narrow down the age a bit, and Panfisher, that is exactly how it appears the ferrule is constructed. If I understand correctly, my wraps on the ferrule should be 2x the outside diameter at the female end of the ferrule, and there should be another wrap that the forward tapered end of the ferrule. I'm assuming there is no need to wrap the middle portion of the ferrule. The whole ferrule is a bit bulky looking to start with, so I'll probably do those wraps in a charcoal color to match the blank and do my guide wraps in something brighter, probably a red or kelly green.