Irish decanter circa 1820.

This is an Irish decanter with 4 neck rings and a bulls-eye stopper. It has a matte etched band around its circumference with diagonal crosses. Made circa. 1820.

This probably made by Cork Glass Co., as I have another decanter exactly the same except is has the vesica and diamond pattern in the matte band. Vesica and diamond was a classic pattern of the Cork Glass Co. but in may have been used by other Irish glass houses, so I can't guarantee that attribution.