This metal-caged glass jar can't be that difficult...

I must be doing or thinking skewey while researching this item...I can't come up with what it is called. The glass jar is hand-blown, and the metal fits around like a cage. This must be a particular style or technique, but I am stumped. Any knowledge to share? I am assuming at this point that the metal is "gold-toned" or brass, although it does show evidence (via small inconsistencies, soldering marks) of being hand-worked. No identifying marks.