I found a similar light online- mine looked like this except no starburst pattern, and frankly this looks like a nicer version of what I had.I'm certain this light was original, so from the mid-70's.
I replaced it (all by myself!) with this light I found at the local re-use center. I paid $12.50 for it total, including the three glass shades. I recently went to Lowes and saw the same fixture for sale there for about $55. I felt pretty smug about that.
It's a huge improvement. In addition to it looking more of-this-century, the added light from the 3rd light bulb makes a huge difference. The bathroom has so much more light now!
Of course I wasn't happy to stop there. While the shades on this fixture are ok, I don't love them. I found these seeded glass "bells" at Home Depot, for about $7 each and put them up in place of the shades that came with the fixture. Even now, I've only spent $33 on this light fixture total, still more than $20 less than what the cost of this fixture new is, so I felt ok spending the extra money to get the look I wanted.
It looks kind of blue here, but I promise, its clear.
It was clear immediately that I need clear light bulbs in the fixture instead of white ones. I bought some recently but they are way too bright, so I need to try again. I had a hard time finding the ones I got (which are Halogen) so hopefully I can find similar ones with a smaller wattage.
Regardless I'm psyched about how my bathroom is looking. The counter top is getting closer and closer to the top of the list!