American precision watch with gold movement Circa 1924

Gold open faced pocket watch
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An important American precision pocket watch with hand engraved solid pink gold movement in a pentagon gold enamel case, limited edition “50th Anniversary Watch”, circa 1924. 14 Carat gold case, polished, finely hand engraved and enamelled edges, the back cover with enamelled monogram. Silvered dial, applied Arabic numerals, auxiliary seconds, trefoil-shaped hands. 12 Carat pink gold bridge movement, lavishly engraved with foliate decor, screwed gold chatons, 8 adj., 23 jewels, “Extra Precision”, gold screw compensation balance, blued balance spring, index spring fine adjusting device, diamond endstone on balance and escape wheel.
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Diameter: 45 mm
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Weight: 70 g
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Signed: Gruen Watch Co, America