Mark Seabrook Antiques has dated this piece to the 17th Century.
....the crackles shown on the picture of the underneath are not cracks...just surface wear and tear....again showing it has had a long life giving good service in the 17thc apothecary or manor house kitchen.

English. C1660-80.-
Reference: See page 82 - illustration 142 for a similar example in Michael Finlay's definitive book on English Decorated Bronze Mortars.
Mark Seabrook Antiques has dated this piece to the 17th Century.
Specialising in 17/18thc oak & country furniture, antique treen, early metalware & english pottery.
You can view the stock and full dealer information on the Mark Seabrook Antiques Profile Page