Rare Swiss stainless steel open faced deck watch Circa 1919

Lever deck watch by Omega
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A rare Swiss stainless steel open faced keyless lever deck watch, circa 1919. Bord movement, 21 jewels, Guillaume balance, micrometer regulator. White enamel dial with Arabic numerals, outer railway minute divisions and large subsidiary seconds. Plain circular case, glazed display screw back, large pink ball shaped crown. Dial signed, movement signed and numbered. Accompanied by duplicate Bulletin de Marche.
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Diameter: 59 mm
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Signed: Omega Chronometre de Bord