Swiss yellow gold Mexican 50 pesos coin watch Circa 1967

Gold coin watch by Patek Philippe
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A large yellow gold 50 pesos coin watch, circa 1967. Manual winding nickel lever movement, stamped twice by the seal of Geneva, mono metallic balance, 18 jewels, gilt sunburst dial, painted black Breguet numerals, black baton hands, outer minute track, 18k yellow gold case, solid snap on case back, concealed in a Mexican 50 pesos “1821-1947” coin, hinged coin cover activated through the case band at 3, case, dial, and movement signed.
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Diameter: 38 mm
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Signed: Patek Philippe   Genève
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Accompanied by a Patek Philippe Extract from the Archives confirming the date of sale on December 26th, 1967, with coin covers representing eagle and “Independencia y Libertad” symbols.