Insulators to the rescue! Those are not very old, probably 1980s. Those are made by Ohio brass, a big porcelain insulator manufacture. The brown on the top is Radio treatment, which was started in the 1970s to keep insulators from interfering with radio waves. They are a nice sky tone blue/grey color. With the pins, probably only worth about 1 - 2 bucks each at an auction or flea market, but nice to have and keep, may go up in value in the future!
Hey, dont feel so bad, I picked up a few insulators at the utility yard that looked nice, and didnt even look at what they said, I got them home, and they had "1996" stamped on them, and Im SUPPOSED to know stuff about these things! LOL!
My worst buy was a McCormick Platte Valley corn whiskey jug at an estate sale $25.00!!
You can buy one off E-bay for $.99 lol.
Although I did buy a rare DOME fruit jar that's worth over $500 for 5 bucks at the same sale. Sometimes you got to gamble a little to get a good deal.
I remember not long ago a lady bought an insulator for $3. at a garage sale then sold it for $10,000 on E-bay.