I picked up this piece at a bottle show out of the trunk of a car. A guy came in said he had a bunch of insulators in his trunk, and since I was the "main" insulator guy, the show host sent him to see me. Everything else was really common, but this piece is something you don't see in Canada everyday, so for 5 bucks, I bought it and a mason jar out of his trunk. The jar is worth about 15-20, so it makes up for it. The piece is marked "GPO", which I have seen on the British stuff before, and on the top it is marked with the year it was made, a logo, and says "Made in England". I just wanted to know anything people know about these. I think they are common, but have no idea.

Kyle