Antiquorum will offer a beautiful musical fan with a hidden watch from around 1810 a gift from Prince Ferdinand of Saxe-Coburg and Gotha to Vicomte de Morais.

WSJ: Collecting: Marking Time With Rare Watches

It was when Queen Victoria decided, 17 years after her marriage to her cousin Albert of Saxe-Coburg-Gotha, to appoint him Prince Consort and to consult him fully about the matters of state that she had to deal with as sovereign.

BBC: Philip the record-setting consort