All the top parts of the textured bottles are individually finished and can vary quite considerably.
I haven't seen an open topped one like this before,
![Grin ;D](http://www.glassmessages.com/Smileys/classic/grin.gif)
but it doesn't surprise me.
They may well have round polished pontil marks, but lack of one doesn't mean anything.
They are sometimes marked in the polished roundel, but I don't really tend to expect them to be marked at all.