Dia.: 12 cm - H.: 6 cm

Ref.:  
- This object is very unusual, rare and repeatedly discussed in Vietnamese art circles and publications. Never before has any porcelain object in Asian art history named two succeeding emperors combined in one base mark. The four-character mark is read from right to left. Crown prince/king Thiệu Trị (1841) ranges before his father's name Minh Mạng. Therefore the earliest dating for this bowl would be the time of Thiệu Trị 's regency. Perhaps commissioned to commemorate the transition of the emperors in 1841.
- Only two such bowls are recorded within Vietnam: One in the possession of Nguyen Xuan Hoa in Huế, another in the collection of Phạm Hy Tùng (HCM Saigon). See Cổ Vật Gốm Sứ Việt Nam Đặt Làm Tại Trung Hoa Nhà xuất bản:Văn Hóa Sài Gòn 2006, p. 318.

Provenance:
- The collection of Dr. Claus Vollers, German ambassador in Vietnam 1981-84.
- The collection of Thomas Ulbrich, Studio Tho, Hanoi-Berlin, acquired from the above.

Condition: (UV-checked)
- The rim with a bronze mount, which shows minor superficial wear.
- A hairline of ca. 4 cm and a star-shaped hairline of ca. 5 cm to the rim.
- A hairline of ca. 4 mm and a section with some short tension lines and glaze lines to the base rim.

品相報告：（已用紫外線光檢查）
- 碗口沿鑲銅口，正常磨損痕跡。
- 銅口下有一條約4釐米的衝線。
- 上述衝線旁邊有一條約5釐米的三角衝。
- 圈足內有一條約4毫米的衝線和一處由多條驚釉構成的碰撞痕跡。