Stained glass hanging lamp (I'd like to know more about).

The more I look this lamp over the more I am thinking that it could be hand made. The lead joints are all uneven, the panes are tilted this way and that, etc. All these things make it even more endearing.
I acquired this lamp from a remodel we did in 2014 on the island in Lake Havasu City, Arizona (right near the London Bridge). I know nothing of its history.
Its' measurements are 13" tall, 25" wide at the widest point, and 11.5" wide at the top flare. It weighs about 20 lbs.
I would love to know anything about this lamp or of one very similar.