RARE BLUE ENGRAVED BLUE GLASS BOWL AND COVER

RARE BLUE ENGRAVED BLUE GLASS BOWL AND COVER, YONGZHENG FOUR CHARACTER MARK AND PROBABLY OF THE PERIOD, the sides finely engraved with four Shou medallions framed by foliate scrolls, united by small lotus blossoms, the low domed cover with knop-finial, the whole raised on a short circular foot, 17cm wide FOOTNOTE: For similar example, without a cover, see Christie's, The Imperial Sale, Hong Kong, 1st June, 2011, LOT NO. 3633 PROVENANCE: From a Private collection.