Swiss gold pocket watch with perpetual calendar Circa 1876

Gold hunting cased calendar pocket watch
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A very fine Swiss hunting case pocket watch with perpetual calendar and moon phase, made for “M. N. Arnot, July 24th 1876”.
18k gold case, tiered, monogrammed, à goutte, signed gold dome. Enamel dial, radial Roman numerals, auxiliary seconds, day-, date- and month indication, moon phase, blued spade hands. Bridge movement, frosted, gilt, wolfteeth winding wheels, gold screw compensation balance, counterpoised lever.
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Diameter: 52 mm
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Weight: 141 g
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Signed: Patek Philippe & Co. à Genève