Thanks very much for your comments Sue, I really hoped you would reply !
I've taken some downloads of MDG photos from here, (GMB) , so I hope it's o.k. to repeat them here....
The square shaped bottle in the background of your pic. may possibly be the same dimensions as this example ?
Also there is a yellow stretched-neck bottle (attenuated ) , shown here, (photo from GMB....can't remember which thread !
) which has a similar working to the enamel.
This bottle weighs a staggering 1.7 Kg , fill it with wine and it would be a problem to lift it
What's going on with the neck
Cheers, Mike