I have a pair of these water jugs. There is a large circle on the side of each, almost as if a label, but there are no markings in this circle that I can detect. The bottom of each jug is marked. I can't, in the photos I took, quite make out what part of those markings is. What I can make out is a 42, there's another figure next to that (the part I can't make out) and on the bottom is what looks like a 7 with a dash below it.
They are a lovely blue color, and I believe them to be blown glass. There are air bubbles visible within the glass that really add to their appearance.
Anyone know anything about these?