Swiss gold open faced Grande Complication watch Circa 1971

Gold complicated lever watch by Audemars Piguet
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A Swiss 18 carat gold open faced minute repeating split-seconds chronograph with perpetual calendar and moon phases, circa 1971. The Grande Complication. Lever movement, manual winding, 36 jewels. Silvered dial with hour indexes and Arabic minutes, subsidiary dials for the months with leap year indication and 30-minute counter, the days of the week and date, constant seconds combined with the phases of the moon. Plain case, snap-on back. Dial signed, case and movement signed and numbered.
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Diameter: 50 mm
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Signed: Audemars Piguet Swiss made
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The Grande Complication. Only about 10 of these highly complicated watches were produced between 1965 and 1973.
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Audemars Piguet confirms that the movement of this watch was made in 1971 and later completed and sold in 1978 in the Caribbean to the present consignor.
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Few manufacturers continued to produce Grand Complication watches in favour of more utilitarian pieces. Audemars Piguet committed their brand to maintain an extraordinary level of watchmaking and continued to manufacture highly complicated hand-finished timepieces such as the present watch, featuring a minute repeater, perpetual calendar and split-seconds complication.