Heading : Four Green-Blue Wine Glasses
Period : George IV- William IV
Origin : England
Colour : Blue-green, often called peacock blue
Bowl : Petal cut conical
Stem : A facet cut ball knop and slice cut stem
Foot : Low conical
Pontil : Polished
Glass Type : Lead
Size :  Height 13.1cm, bowl 6.8cm, foot 6.8cm
Condition : Excellent. There are some sooty particles and other pieces of clinker within the stems and bowls.
Restoration : None
Weight: 478 grams

References :

Miller’s Glass Buyers Guide – Page 150.

British Glass 1800 – 1914 By Charles R. Hajdamach – Page 53 Plate 2.

Strictly speaking the Regency period covered by the Regency Act lasted from 1811 to 1820.