Technical Description
A fine 18th-century double series air twist cordial glass dating to c1750.
It has a round funnel bowl with a solid section at the base. Sits on a double series air twist stem consisting of a 6-ply spiral air band outside a pair of mercury corkscrews. Conical foot.
You often see this form described as a double series mercury twist, however that form does not exist. To be a mercury twist the glass can only have a pair of mercury corkscrews and if combined with another element it should be referred to as a double series air twist as both elements are air and not mercury.
The Mercury twist is named after and revered for its mirror-like refraction, not unlike liquid mercury. Not to be confused with a corkscrew air twist where the twist remains transparent, not reflective. This mirrored sheen is a consequence of the refraction of the light within the air pocket due to the air pockets geometry, a rather ingenious all be it surprising discovery.
If you would like to learn more about 18th century air twist wine glasses, please have a look at our on line article below
Identification of Antique Drinking Glasses | The English Air Twist
Date & Origin
England, c1750. Period of George II.
Condition
Excellent, no chips cracks or restoration
Dimensions
Height: 15.8cm, Rim diameter: 4.6cm, Foot diameter: 7.3cm
