this, I really like. simple, without ornamentation and with a subtle feeling of being old (bit like me). The glass is of poor quality - no inclusions or stones, but air bubbles and moulding defect around the neck. 15.8 cms. tall and about 7.5 cms at the widest at the base. Good old fashioned bottle green - flared top (fire polished rim) with 8 way crimp and 12 optical ribs, and a mould blown base without markings except possibly an indented 'O', which is about one cm. diameter a little off-centre on the base -which has 'shed' loads of wear. Why the slight thickening at the neck I'm not sure. No sign of iridescence. I don't see it in the books, mainly I wud imagine because it is too much of a utility looking piece, and when struck with a finger nail, the ring dies almost instantly. Not really looking for a maker - probably imposible to tell - but wud appreciate peoples thoughts on age please. cheers and thanks for looking. Paul S.