bathroom sink faucet removal
 

I have a 25-30 yr old faucet, flex tubing disconnected, pop-up drain removed, faucet does not have plastic nuts to attach to sink, it has a big brass piece with a plate on the underside of the sink, can't get the spigot loose, got the handles loose but stems are still in place. Don't see an obvious nut on underside brass fitting anywhere.

There are literally 1000's of different faucets so need more info and preferably pics.

If you have a three piece faucet--two handles and a spout---the handles are held in from the top side--

Remove the handles--unscrew the bell shaped cover--and you will find a nut holding on the valve---