https://www.sothebys.com/en/auctions/ecatalogue/2017/important-chinese-art-l17212/lot.3.html
(#3) A SMALL DOUCAI 'DRAGON' WATERPOT YONGZHENG MARK AND PERIOD
3 ayongzheng marksmalldoucaidragon
https://www.christies.com/en/lot/lot-5661912
A YELLOW-ENAMELED BOWL , YONGZHENG SIX-CHARACTER MARK IN UNDERGLAZE BLUE WITHIN A DOUBLE CIRCLE AND...
YONGZHENG SIX-CHARACTER MARK IN UNDERGLAZE BLUE WITHIN A DOUBLE CIRCLE AND OF THE PERIOD (1723-1735)
https://www.christies.com/lot/lot-a-small-anhua-decorated-ruby-enameled-bowl-china-qing-6276793/?from=salesummery&intObjectID=6276793
A SMALL ANHUA-DECORATED RUBY-ENAMELED BOWL, CHINA, QING DYNASTY, YONGZHENG FOUR-CHARACTER MARK IN...
CHINA, QING DYNASTY, YONGZHENG FOUR-CHARACTER MARK IN UNDERGLAZE BLUE WITHIN A DOUBLE SQUARE AND OF THE PERIOD (1723-1735)