Swiss gold minute repeating perpetual calendar Circa 1957

Gold minute repeating perpetual calendar split second chronograph
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A Swiss fine and rare 18k yellow gold open-faced minute repeating perpetual calendar split second chronograph watch with moon-phases, circa 1957, cal. 17”’ manual winding damascened nickel lever movement, 40 jewels, precision regulator, repeating with two hammers on to gongs.
Silvered dial, applied Arabic numerals, four subsidiary dials for month, day, date in Englishand constant seconds combined with moon-phases, case with scooped bezel, squared faceted bow, repeating slide in the band, split seconds chronograph button in the crown and the band, case, dial and movement signe. Extract from the Archives confirming sale in 1960, leather pouch.
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Diameter: 50 mm
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Signed: Patek Philippe
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The accompanying Extract from the Archives for this watch records the date of manufacture of the movement as 1927. The Extract from the Archives further states that Patek Philippe later completed and encased the movement in 1957 and the watch sold initially on July 16th of the year 1960. The dial on this watch appears unusual as it does not have the standard batons normally seen, but Arabic numerals. An example of this rare reference is illustrated in Huber, M. & Banbery, A., Patek Philippe, p. 234. A picture of the movement is on the same page.