The Fibalite Perfections have also this black around the ferrules. The JET has windings for reinforcement around the female ferrules. I can not believe that the succession models would have no reinforcement at all around the ferrules. Only black paint for esthetic reasons make no sense to me. Are the spigot ferrules on the JET and Fibalite solid? Can't find the British patent 1429309
What we can now assume is that JET and Fibalite rods don't share the same taper they are different.
With respect, I dont think we can
assume that the JETs and Fibalites don’t share the same taper, only that the blanks were made in different factories (Fisher and Alnwick respectively), and the appearence of the Fibalites was surprisingly different as a result of the switch in spigot material and colour.
I have really enjoyed this thread, and it has pushed me to remember a lot of what I learned about Hardy’s and their rods at the time, much of it in the Pall Mall store.
In particular, the female ferule of the Fibalites was to an extent sacrificial: if the gap between it and the gloss black part of the male ferrule became too narrow, you were told to borrow your mother’s nail file (!), and file about 1/8” off the female ferule, to increase the clearance again. You could do this with the JETs, but would have to re-whip afterwards, which explains the conditions of many of the rods that are on the secondhand market now.
Clearly, this doesn’t tell us if there was any graphite in the Fibalite ferules, but I recall the filing being very easy to do.