Small English gold and platinum lady’s pocket watch Circa 1875

Platinum and gold lever pocket watch 
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A very fine English, small, historic, platinum and 18K yellow gold pocket watch in the style of Breguet with a short gold chain and ratchet key, circa 1875. To The 7th Earl Spencer, Grandfather of Diana, Princess of Wales. Engine-turned, polished bezel and borders, platinum band, the inside back cover with engraved dedication. Hinged gold cuvette. Silver dial, engine-turned, eccentric chapter ring with radial Roman numerals and outer dot minute markers. Gold Breguet hands. A frosted gilt movement, Lépine type calibre, 13 jewels in screwed chatons, female winding arbour, lateral lever escapement, cut bimetallic compensation balance with gold peripheral timing and temperature adjustment screws, blued steel flat balance spring, index regulator. Movement signed.
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Diameter: 41 mm
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Signed: J & H Jump  London
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The dedication reveals that this watch originally belonged to Edward Charles Baring, 1st Baron Revelstoke of Membland, and was given by him to his wife Emily in 1884. In 1892 she left it to their grandson, Albert Edward John Spencer, who became the grandfather of Diana Frances Spencer, later H.R.H The Princess of Wales, and thus the great grandfather of Princes William and Harry of England. Albert Edward John Spencer was born on April 13, 1828, and died on July 17, 1897. He married Louisa Emily Charlotte Bulteel on April 30, 1861. He was educated at Rugby School, Rugby, Warwickshire, England. He was created 1st Baron Revelstoke of Membland on June 30, 1885.
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He was a senior partner of Baring Brothers, merchant bankers, before 1890, and lived at Revelstoke Manor, Devon, and Membland Hall, Devon. Edward Charles Baring and Louisa Emily Charlotte Bulteel had ten children. Among them, was the Honourable Margaret Baring (1868-1906), who married Albert Edward John Spencer, 7th Earl Spencer (1892-1975). They had two children, Lady Anne Spencer and Captain Edward John Spencer, 8th Earl Spencer (1924 – 1992). The latter married Hon. Frances Ruth Burke-Roch. Their daughter, Lady Diana Frances Spencer (1961-1997), married H.R.H. Charles, Prince of Wales, on July 29, 1981. Their first child, William, was born on June 21, 1982. Their second child, Henry, was born on September 15, 1984.