A heavy pink gold open-faced minute repeating perpetual calendar keyless lever watch with moon phases, B. Haas jeune circa 1910

18k, nickel lever movement, bi-metallic compensation balance, repeating on two gongs, signed cuvette with description, white enamel dial, roman numerals, sunk subsidiary dials for month over four years, date, day and constant seconds combined with aperture for moon phases, gold Louis XV hands, engine turned heavy case with blank monogram cartouche in the centre, repeating slide in band.