If it has a 21FBP22 with the separate safety glass, save that, and the rubber gasket! With so many bonded tubes going bad in the face, and no more local rebuilders to replace the jelly or remove the bonded glass and band the tube, those front glass & gasket setups are getting to be like gold!
It's all well & good that there are ways outlined here to remove your own bonded glass, but that leaves the TV unsafe to implode and spray glass all over the room
Charles