Cartier. A large stainless steel and gold automatic wristwatch with date and bracelet, Balloon Bleu, circa 2018
Movement: automatic
Dial: silvered, engine-turned centre, chapter ring with Roman numerals, aperture for date, centre seconds
Case: stainless steel, back secured by eight screws, synthetic spinel cabochon-set winding crown, stainless steel and gold bracelet with double folding clasp
Signed: case, dial, movement and bracelet
Dimensions: diameter 41.5mm.
Accessories: instructions and certificate
£4,000-£5,000

Cartier launched the Ballon Bleu range in 2007. With its unique case design with integrated crown guard and rounded case to both sides making it resemble a pebble, this watch equally suits both men and women.