About the Cartier watch:
The watch mechanism is set in a stainless steel case and attached to a stainless steel bracelet. The watch has a silvered opaline dial with blue sword-shaped hands and Roman numeral hour markers and a blue synthetic spinel cabochon.
Here’s how the watch is described at Goldsmiths:
Floating like a balloon and as blue as the cabochon safely nestled in its side, the Ballon Bleu watch by Cartier adds a dash of elegance to male and female wrists alike. Roman numerals are guided on their path by a deep blue winding mechanism. With the convex curves of the case, guilloch dial, sword-shaped hands, and polished or satin-finish links of the bracelet…the Ballon Bleu watch by Cartier floats through the world of Cartier watchmaking. Ballon Bleu de Cartier watch, 33 mm, mechanical movement with automatic winding. Steel case, fluted crown set with a cabochon synthetic spinel. Silver guilloch dial. Blued-steel sword-shaped hands. Sapphire crystal. Steel interchangeable bracelet. Thickness: 9.96 mm. Water-resistant up to 3 bar (approx. 30 meters/100 feet).Goldsmiths