I think dating a handle has more to do with what it's fixed to, i'm on my knees at the mo example wise but here are five recent ones, a modern piece of Murano, a late Vic oil lamp, a piece of modern egyptian glass, a webbs creamer 1960's in amethyst and custard early Victorian i would think.
If you google Murano jug you will see hundreds top to bottom, bottom to top.