Aramis Antiques has dated this piece to the 1860s.
The bowls stand on chamfered stems flowing down from the lobes, each on a plain foot with pontil mark underneath. Each glass weighs approx 400grams and holds a half pint or 300ml of liquid. A very good glass of wine is to be had from these rummers! They feel great in the hand too.
Aramis Antiques has dated this piece to the 1860s.
You can view the stock and full dealer information on the Aramis Antiques Profile Page