Waterman Edson Emerald Green (18ct)
Only the gold cap for all the Edsons from Waterman
Only the cap, with a small imperfection at the point (see pic)
In the main text there are a couple of words I don't know.
But the gist of it is that this is a cap that can be used on the Emerald or Blue Edson, that only the cap is sold, not the pen itself and that the cap has a small ding at the top.
I guess he got himself a new cap and is trying to get something out of the old one.
reply from seller,