Some misinformed vintage jewelry sellers refer to just about every milky bead as "Peking glass." It's a term that has come to mean absolutely nothing to me; I just tune it out when people pull out their beads to show me.
It's hard to find any old beaded jewelry these days - I mean anything made before 1940 (it's probably all on the web).
But I have found some great Venetians at flea markets over the years. Here's a lousy photo of 3 examples. (Truthfully, I have a clear memory of the source of the middle strand only. Can't say I remember where I found the other 2. )
You can still stumble upon old antique sellers who think glass beads are just junk. The round millis were sold to me by a consignment vintage clothing seller who thought they were the ugliest things she'd ever seen and wanted them out of her case. If she hadn't been such a witch, I might've been overcome with guilt and offered her more money. These beads are HUGE.
But you also stumble upon dealers who call every glass bead, even the clunkiest new ones, "antique Venetian glass from the late 1800's."