Thanks, I remember reading that from Paul. The thing about counting the cuts on the stars seemed a bit unreliable as it would be so easy for manufacturers to do it differently. Maybe a smaller star would have fewer cuts etc. The Miller’s glass Antiques Checklist, Mark West (consultant), says it’s difficult dating 19th century jugs and the only applicable dating point he mentions is the style of the handle. Top down being the style before c.1870. I would guess 1850 to 1870.
It weighs 600g which doesn’t feel particularly light or heavy and nicely made, as you say.