Autographs

Einstein’s Michele Besso letter triples estimate

Einstein’s Michele Besso letter triples estimate

Albert Einstein writes on the subject of the cosmological constant

Mao Zedong’s handwritten notes smash estimate

Mao Zedong’s handwritten notes smash estimate

Sotheby’s secured a result of $908,000 for the Mao memorabilia

Albert Einstein’s Michele Esso letters to auction

Albert Einstein’s Michele Esso letters to auction

Michele Esso was Albert Einstein’s closest friend

Sir Isaac Newton receipt to auction at RR

Sir Isaac Newton receipt to auction at RR

Sir Isaac Newton’s bad investment could beat $25,000

Alan Turing psychiatrist postcard to sell in February

Alan Turing psychiatrist postcard to sell in February

Alan Turing wrote the postcard just a year before his death

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