I've seen a fair few big Earthtones bottles with no flanges and roughly ground tops.
The bottles have a big square base, with an attenuated neck.
But that is the only thing I see regularly with a roughly ground top.
I suppose it is perfectly possible this was done at the factory, and as John says, left rough to there can be no doubt about it being a second. (or because they didn't have polishing time or enough facilties...)
I don't have these any more, sorry, I can't provide an image of the ground top.