An unusual Patek Philippe two tone 18ct gold Gondolo Flip cover wristwatch, ref, 5099, with straight white gold lugs, frosted pink gold dial, painted Arabic numerals, outer minute track, subsidiary seconds dial on a manual 18 jewel cal. 215 straight-line lever escapement, Gyromax balance adjusted to heat, cold, isochronism and 5 positions, Patek leather band and 18ct buckle.