Swiss gold split-seconds chronograph with recorder Circa 1923

Gold split-seconds chronograph and minute recorder
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A Swiss gold split-seconds chronograph and minute recorder; Astral, 18k yellow gold by Vacheron Constantin, circa 1923.
White enamel dial, 18K yellow gold, open faced, keyless-winding, round-shaped pocket watch, with subsidiary seconds at 6, 1/5 second chronograph (activated by the single round push-piece located on the winding-crown), Split-seconds activated by the rectangular push-piece located on the case band at 11 o’clock, Half-instantaneous 30-minute recorder, subsidiary dial at 12 o’clock, Cuvette engraved in taille-douce (fine cut) with the mention Vacheron & Constantin / Genève / Astral.
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Diameter: 50 mm
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Signed: Vacheron & Constantin Genève
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The Extract from the Archives, dated September 29, 2017, mentioned that this watch was manufactured in 1923. Vacheron Constantin, “Astral” and “Trident” The “Astral” trademark for watch and clock movements was registered by Vacheron Constantin on February 22, 1895 (under No. 7 312). Later, on November 29, 1902, Vacheron Constantin registered the trademark “Trident” (under No. 15 123). These two tradenames were used until 1940 for the rare occasions on which they sold watches manufactured by other firms under their company name. In the 1920s, Vacheron Constantin used a few movements (some 8-day going) with the signature “Astral” for their clocks with Art Deco cases elaborated by Verger Frères, Paris.