Roman Pale Blue Ribbed Glass Vessel

1st century AD. A Zarte Rippenschale glass bowl with squat D-section body, short knocked-off everted rim with subtle undulations, circumferential tooled ribbing around the outside wall with arched tops and open bottoms; areas of iridescence. See The Corning Museum of Glass, accession number 58.1.35, for similar; see The Metropolitan Museum, accession number 17.194.186, for similar. 57 grams, 89mm (3 1/2"). Property of a London gentleman; before that in the private collection of a Kensington collector; previously in the collection of Mrs Petra Schamelman, Breitenbach, Germany; acquired from the collection of Fernand Adda, formed in the 1920s.
Condition Report: Very fine condition.