Tom Lovig designed the Gerbubble Bug in the early 1900s to fish for bass on the Chesapeake Bay. It is a very effective fly but did not become popular until the May 1971 issue of Fly Fisherman popularized it with the history and tying instructions.
It’s not difficult to tie, but forming the head is time-consuming. Modern woodworking tools and a few jigs can make the process much easier.
I have written a book entitled Tying Tom Loving’s Gerbubble Bug that describes my method of tying the fly. It’s available on Amazon .com Kendle books.