A Cartier Continental openface keyless jewelled lever pocket watch, the movement unsigned, case numbered 9582, the signed engine-turned dial with Arabic numerals and subsidiary seconds, with Cartier documentation.

Recommended features

• • 

  • Yves Klein: ‘He had no limit’

    Daniel Moquay, head of the Klein archives in Paris, discusses the French artist’s spirituality, his relationship with the colour blue — and his love of judo

• • 

  • 15 things you might not know about Albert Einstein

    Letters, postcards and photographs from the personal archives of Einstein’s sister and brother-in-law shed new light on his extraordinary life and complex character