瓷器盒裝的是菲德烈大帝的長笛

出處: Quantz, Johann Joachim (attributed). "DCM#: 916 Flute in C - Porcelain Case Shown Holding the Corps de Rechange. (The decorative painting and guilded brasswork declares that this instrument was intended for royalty -- in this case, Frederick the Great)." Ca. 1740-50. Dayton C. Miller Flute Collection, Library of Congress.