Stopped by an antique mall not far from my house today. There were four floors and lots of junk to look through, but I eventually found a couple shelves of insulators. All common stuff, but I was able to find this unembossed 143 among them. Is it weird to find one of these in a Western PA antique shop?

I took it up to pay for it, asked the shop owner if he had or knew of any others. He thought about it for a moment and then ran out to his car. Came back with a mint 104 New England Tel & Tel Co. in aqua and a mint 121 AT & T in dark aqua with some amber. Ended up getting both of those, too! Nice to see something different for a change.