[Chart of copper gilded enamel baby love]Chart of copper gilded enamel baby love, Isac Bercer, Copenhagen, Denmark, 18th century, with a surface diameter of 3.9 cm and a thickness ...

[The gold-plated ox carrying water method flower clock]The gold-plated ox carrying water method flower clock, James Cox, London, England, 18th century, is 79 cm high, 36 cm wide an...

[Geometric polyhedron model]Geometric polyhedron model, made in the reign of Emperor Kangxi of the Qing Dynasty, with the box 45.3 cm long, 27 cm wide and 9.2 cm high. The old coll...

[Copper gold-plated scale gauge]Copper gold-plated geometric scale gauge, made by the Qing Palace Building Office, was 33.3 cm long, 6.2 cm wide and 0.7 cm thick during the Kangxi ...

[Copper gold-plated comprehensive ruler]Copper gold-plated comprehensive ruler, made by the Qing Palace Building Office, was 15.3 cm long, 4.9 cm wide and 0.2 cm thick during the K...

[Copper height arc quadrant]The copper height arc quadrant was manufactured under the supervision of the Qing Palace Construction Office during the reign of Emperor Kangxi of the Q...

[Paper chip calculator]Paper chip computer, Emperor Kangxi of the Qing Dynasty, 16.7cm long, 8.7cm wide and 5cm highPaper chip hand computer is a kind of computer that was transfor...

[Black lacquer-box drawing instrument]Black lacquer-box drawing instrument, Qing Kangxi, box length 25.5 cm, width 22 cm, thickness 5.5 cm. Made by the Qing Palace Building Office....

[Gold-plated copper disk handheld computer]Gold-plated copper disk handheld computer was 55.5cm long, 12cm wide and 4.8cm high in the Kangxi period of the Qing Dynasty. The old col...

[Kangxi Dynasty Globe]The Kangxi Dynasty Globe, made by the Qing Palace Building Office in Kangxi, Qing Dynasty, has a height of 135 cm and a diameter of 70 cm. The old collection ...