File that one down to bright metal along the crack and clamp it into a vise to close it up. Then use silver solder to put a layer of repair material over it maybe 1/16" thick or more. It might be necessary to also run the silver solder all the way around the joint where the pressed-on top ring attaches. If it's soft-soldered the heat of applying the silver will cause it to leak or separate.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!