Swiss platinum glass crystal and emeralds dress watch Circa 1930

Platinum single-piece dress watch by for A l’Emeraude
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A Swiss, platinum, glass crystal and emeralds, keyless-winding, single-piece dress watch, circa 1930.
Rhodium-plated movement, unnumbered (probably by Niton, Geneva), with Geneva Quality Hall Mark, lever escapement. Signed silver dial with Breguet radial hours, outer minutes track, and original Cathedral hands. Brushed platinum case and the border with glass crystal and emeralds

Diameter: 45 mm

Signed: A L’emeraude, Lausanne
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A l’Emeraude
A l’Émeraude is a historic Swiss retailer and jeweller rather than an independent pocket watchmaker, though its signature can be found on highly valuable, antique pocket watches from the past.
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Manufacture des Montres Niton S.A.
Niton was founded in Geneva in October 1919 by watchmaker Auguste Jeannet alongside former Vacheron Constantin employees Alfred Bourquin and Edouard Morel, rising to become a premier creator of ultra thin movements and Geneva Seal pocket and dress watches. The name “Niton” comes from the Pierres du Niton, two massive ancient granite boulders sitting in the harbour of Lake Geneva.
Niton specialised in ultra thin calibers, shaped (form) movements, and exquisite finishing. During the 1920s, it was one of the largest producers of movements bearing the prestigious Geneva Seal (Poinçon de Genève). The company supplied high-end movements and complete bespoke timepieces to elite houses like Patek Philippe, Cartier, Breguet and A. Lange & Söhne. 

In 1928, Niton registered a distinctive digital jump-hour display, which became its defining artistic signature.
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Repair required