Extremely fine Swiss gold royal presentation pendant watch Circa 1860

Gold watch made for the Spanish court 
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An extremely fine Swiss 18 carat gold royal presentation pendant watch, circa 1860. Made for the Spanish court. A round shaped case, the cover set with several rose cut diamonds forming the cypher. Set with the initials of Isabella II (1830-1904), Queen of Spain (1833-1868). Stamped by a Royal closed crown with eight tiaras, on dark blue translucent enamel, said to be Royal blue, on guilloché engine turned background, surrounded by a garland of foliage in ors paillonnés–technique (tiny motifs or spangle/ glitter/sequin cut into gold leaf) sous fondant (under flux).
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The case back is decorated en suite with a multicoloured coat of arms of Spain, stamped by the same crown with the gold collar of the Order of the Golden Fleece, intermediate with the light blue and white ribbons of the Royal and Distinguished Spanish Order of Charles III and surrounded with the same garland interspersed with fleur de lys. A gold cuvette, engraved with scrolled decorations and technical specificities. White enamel dial, with black painted radial Roman numerals and blued steel Breguet hands.. Frosted gilt brass movement, bridge calibre with barrel, ten rubies, straight line equilibrated lever escapement, compensated balance with gold poising screws and blued steel flat hairspring, polished steel endplate, index regulator. Signed on the movement; signed and numbered on the plate under the dial.
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Diameter: 50 mm
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Signed: Longchamp & Pizzala  Geneva
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Accompanied by a châtelaine, with two Royal closed crowns, each with eight tiaras and a red translucent enamel bonnet, in multicoloured gold set with several rose cut diamonds. Chain: Lengte 13,3 mm.