Exhibit Antiques has dated this piece to the 1850s.
A truly superb 19th century peacock blue wine glass. It has a ribbed ogee bowl above a large shoulder blade and ball knop stem. Conical foot with polished pontil. Peaock Blue is one of the rarest of the colours produced in the 1st half of the 19th century.

Date & Origin
England, c1840. Period of Victoria
Condition
Excellent, age-related wear as shown.
Dimensions
Height: 12.7cm Bowl diameter: 6.1cm Foot diameter: 6.7cm.
Comments
The ribbed design can be seen in a number of different Richardson designs from this period as well as finger bowls and serving bottles, however, wine glasses in this form and are exceptionally rare and outside a set we sold a few years back we were unable to find any documented examples in our library or online.

Historical Relevance
In 1840, Wagon Trains start the journey to California, Covered Wagon Trains took immigrants on a journey from Missouri River towns to what is now the state of California. The trip was about 2,000 miles and each night the Covered Wagon Train would form a circle for shelter from wind and extreme weather, they would put all the animals in the centre to prevent them from running away or being stolen.
Exhibit Antiques has dated this piece to the 1850s.
Specialists in 18th & 19th century antique glass
You can view the stock and full dealer information on the Exhibit Antiques Profile Page