It seems, that on some models (don't ask me which ones) the knob is only fixed with a splint. To access it, simply remove the leather (or plastic) under your knob (its only fixed with the plastic of the middle console).
But it can be that not all Bravo models have fixed the knob like this. Just try, its not that much work. If there is no splint, then you can still use the saw to get it of.
Why do you all wanna take a saw to your car?! I had the same problem when i came to put a Momo Alu Sport knob on. If you look at the Haynes manual it shows a fiat tech tool that they use to remove it, all it really is is a tool to provide a bit extra leverage, between the knob and the collar around the gear lever, this can be easily made using a couple of strips of metal and a couple of nuts and bolts. Takes 5 minutes at the most and causes no damage.
Thanx Alan....never been called a "good lad" b4 !! LOL
It does appear that FIAT changed the design of the knob from a "whacked on" version 2 a screwed version.
Like Alan said, I used a hacksaw 2 cut down the middle and prised it off within seconds. NO DAMAGE DONE ! (xcept 2 the old knob !!)
Ur then free 2 fit any knob u like.....here's a pic of mine....