French gold and enamel book-form pendant watch Circa 1850

Gold cylinder pendant watch by Charles Oudin
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A fine and rare French, 18K gold and enamel pendant form watch in the shape of a book with the Lord’s prayer Our father who art in heaven written in a small panel inside the book, circa 1850.
Front cover with blue enamel fitted with a watch and the back cover in blue enamel with a diamond cross. Enamel dial with Roman radial hours, outer minutes track and spade hands. Heart-shaped movement, bar calibre, ten jewels, cylinder escapement, plain gilt brass balance, blued steel flat balance spring, index regulator. Signed case and with original gold winding key.
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Dimensions: 32 x 27 mm
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Signed: Charles Oudin Paris