German pendant watch with Lange’s Guillaume-type balance Circa 1910

Gold lady’s pendant pocket watch 
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A very fine German 18 carat yellow gold keyless pendant watch with Lange’s Guillaume-type balance. Accompanied by the original Freccero rosewood fitted box. Made for Spangberg y Freccero, retailer in Montevideo (Uruguay), by J. Assmann, Glashütte ^I/SA Switzerland Circa 1910.
Four-body, bassine and polished case with hinged gold cuvette. Three-piece dial with white enamel with Breguet numerals, outer minute track, subsidiary sunk seconds and gold spade hands.
Frosted gilt movement with 15 jewels, straight-line Glashütte lever escapement with a gold fork and escape wheel, cut bimetallic compensation balance with gold temperature screws, blued steel Breguet balance spring and an index regulator. Dial, case and movement signed, cuvette signed by the retailer.
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Diameter: 36 mm
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Signed: J. Assmann, Glashütte ^I/SA