Gerald Genta Perpetual Calendar vintage wristwatch

in 18kt yellow gold, ref. G29947 - 42451, 33 mm hexagonal case. bezel with Roman numerals, mother-of-pearl dial, three auxiliary dials for date, days, months and one in lapis lazuli for moon phases, faceted sapphire crystal, mechanical movement with automatic winding, 2504 caliber, leather strap with original 18kt yellow gold buckle, signed case, dial and movement, complete with box and key