I see what you mean about the base wear on the tricorn bowl.

The colour is different to the green of the side stripe, but I'd not argue about the attribution. Is the glass itself clear? (rather than opaque).
I did find myself wondering if it came from a batch of bottle cullet glass they had that was simply a good bluey-green colour?

I've got a small green MDG cut-ice lollipop, (uncut, just marvered into shape) and I've taken some pics to show the colour, because it's not all mixed up with other colours - there is some silver nitrate in it, it just doesn't interact with the clear green too much.
When I got it out for photographing it just now, I found the base is a little odd. One bit is it is the normal batutto style, but at an angle to that, there is a plain flat bit.
Honestly, really, properly flat. I've taken pics.