GUIDON, GIDE & BLONDET FILS（1801-1804），嵌有珠寶的瑞士琺瑯黃金自動音樂鼻煙盒《音樂課堂》 ，1804，附有標記，機芯刻有簽名「ANT. ROJARD À GEN È VE, INVINIT ET FECIT, NO 2170」；圖片由藝術家及佳士得提供 估價：港元850,000 – 1,300,000 GUIDON, GIDE & BLONDET FILS (1801-1804), A SWISS JEWELLED ENAMELLED MUSICAL GOLD SNUFF-BOX WITH AUTOMATON “THE MUSIC LESSON”, 1804, MARKED, THE MOVEMENT WITH SCRATCHED SIGNATURE ‘ANT. ROJARD À GENÈVE, INVINIT ET FECIT, NO 2170’; Courtesy of the artist and Christie’s Estimate: HK$850,000 – 1,300,000