Swiss 18K yellow gold minute repeating dress watch Circa 1911

Gold watch made for Tiffany & Co.
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A very fine Swiss 18K yellow gold, keyless minute repeating dress watch, circa 1911. Made for Tiffany & Co. Accompanied by an Extract from the Archives. The black enamelled initials on the back: GSW, gold hinged cuvette engraved: JH R, July 10-20, 1911, True Friendship. White enamel dial with printed radial Arabic numerals, outer minute divisions with five-minute red Arabic markers, subsidiary sunk seconds dial and blued steel double spade hands. Movement with Geneva striping decoration, 29 jewels, eight adjustments, straight-line calibrated lever escapement, cut-bimetallic compensation balance, blued steel Breguet balance spring. Repeating on gongs by activating slide in the band. Movement and case signed, dial signed Tiffany & Co.
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Thickness: 10 mm
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Diameter: 46 mm
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Signed: Patek, Philippe & Cie.  Genève
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A minute repeating watch tells the time both visually and audibly. A slide on the side of the case, usually near the 9, will activate two hammers in the movement. These hammers strike two gongs curled within the case. First one hammer strikes a gong of lower tonality; it will count out the hours. Then both hammers will strike both gongs alternatively to count out the quarter hours after that hour, and then the second hammer alone striking a gong of higher tonality will count out the minutes after that quarter-hour.
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The repeating mechanism was developed by Daniel Quare. In 1687, he patented a mechanism that sounded the hours and the quarter hours. The early repeaters used bells. At the end of the 18th century, two bent-wire gongs became the more popular mechanism. In 1892, the first-minute repeater wristwatch was produced by Omega, a model with a round-shaped case.