This is a stunning example of a lead crystal goblet or rummer, British in origin and probably produced at the Richardson Glassworks.
The capacious bowl has been cut with a circumferential band half an inch below the rim. Below this the bowl has been acid-etched, giving it a frosted or opaque finish. This has then been overcut with seven pairs of curved lines which form arches. Between adjacent arches are two wedge cuts and a single vertical cut that form a stylised upward-pointing arrow.
The base of the bowl merges with the stem. There is a short, tapering portion that sits above a wider section, which has been cut with six vertical facets to make it hexagonal in cross-section. This also contains an elongated enclosed air bubble.
There is a further short plain portion that joins the stem to the plain, flat foot. The latter has a central polished pontil and is unmarked.
This style of cutting and acid-etching is frequently seen in pieces attributed to the Richardson Glassworks.
It has a height of approximately 16.7cm, with a diameter across the rim of about 8.7cm and across the foot of about 8.5cm.
It has a liquid capacity (to the brim) of 325ml.
It has an unwrapped weight of 220g.
It is in excellent condition, with no chips or cracks, although there are numerous wear and tear scratches to the underside of the foot commensurate with age and use.