Firstly, I may have the wrong gearknob for my car, it wouldn't be the first item that was awry!
Anyway, you cannot really see it, but the insert, within the leather, has split horizontally, right at the top of where it threads onto the gear stick. You can just see a faint ripple in the leather halfway down the chamfered section.
A - Is this the correct gear knob?
B - Is either the knob, or insert, easily replaceable, before I embark on a thorough restoration?