French gold, champlevé enamel book-form pendant watch Circa 1870

Gold cylinder pendant watch
–
A fine and rare French, 18K gold and enamel book-form pendant watch with a concealed compartment containing a concertina frame for three photographs, circa 1870. The front and back covers are decorated with black and white champlevé decoration and engraving, the spine engraved, hinged, engraved clasp, and the back cover contains a concertina gold photograph frame for three photographs ring suspension loop. Hinged gold cuvette, White enamel dial, radial Roman numerals, outer minute divisions. Blued steel spade hands. Heart-shaped movement, bar calibre, ten jewels, cylinder escapement, plain gilt brass balance, blued steel flat balance spring, index regulator.
–
Dimensions: 30 x 25 mm
–
Signed: Charles Oudin  Paris
–
The case is slightly oxidized.