Originally Posted by Chris_H
if you like the instrument, give it to a luthier. If you are willing to risk ruining it, try not to.
Stop it, doing simple repairs like this is how we learn. There is no need for you to be a defeatist telling him to not even attempt it.
OP, you are going to need a couple clamps deep enough to reach the bridge through the sound hole. Makes sure you get all the old finish off the bottom of the bridge, and the top where the bridge mounts. Then glue it back on with enough Titebond to completely cover the repair, with minimal squeeze out. It's not a terribly difficult repair.