New coins from Austria, Hungary, and the United Kingdom.
Obverse Description
Chinese and Portuguese text; stylized bird; BNU seal; former BNU headquarters building
Reverse Description
Chinese and Portuguese text; BNU seal; Macau skyline from 1980s, including Macau-Taipa Bridge and Bay of Praia Grande
Catalog Information
Send Catalog Feedback
Subject: I would like to contribute catalog info to CDN for 20 DE DEZEMBRO DE 1999 Sig A69/DG4 Prefix GC - KU
Body: Referring page: http://www.greysheet.com/prices/item/20-de-dezembro-de-1999-sig-a69-dg4-prefix-gc-ku/gsid/119670 GSID: 119670 Title: 20 DE DEZEMBRO DE 1999 Sig A69/DG4 Prefix GC - KU
View more data, info, and visualizations. Get access to retail and wholesale pricing as well as auction data.
Values
Greysheet News
The rare coin market so far in 2026 has been somewhat volatile, with greater price swings happening over a shorter period of time when compared to historical norms.
Free three-day Fall Expo brings Stack's Bowers Galleries Showcase Auction lot viewing, a 2026 U.S. 250th Anniversary coins, educational programming, and one of the hobby's biggest dealer floor to the Baltimore Convention Center.





