Breguet. An impressive and extremely rare 18K gold, diamond and ruby-set openface minute repeating perpetual calendar keyless lever chronograph watch with instantaneous 30 minutes recorder and phases of the moon

Breguet. An impressive and extremely rare 18K gold, diamond and ruby-set openface minute repeating perpetual calendar keyless lever chronograph watch with instantaneous 30 minutes recorder and phases of the moon
Signed Breguet, No. 1367, sold to Maison Chaumet, circa 1980
Cal. 17''' nickel-finished lever movement, 32 jewels, bimetallic compensation balance, minute repeating on two polished steel hammers, gold cuvette, the pavé-set brilliant-cut Arabic five minute divisions on blank chapter ring, blued steel moon-style hands, four subsidiary dials indicating phases of the moon combined with 30 minutes register, 24 hour display combined with day, month combined with leap year indicator, date combined with constant seconds, in massive circular case with reeded band, the bezel set with rubies and baguette-cut diamonds for the hours, surrounded by brilliant-cut diamonds, brilliant-cut diamond-set pendant, plain back, repeating slide in the band, chronograph button in the crown, case, cuvette, dial and movement signed
56 mm. diam.