Patek Philippe & Co., Geneve No.927644: A fine 1940's gold perpetual calendar wristwatch, the matt silvered dial with raised alternating dot and Arabic numerals, subsidiary dial for running seconds with gold seconds hand, combined date ring with central blued steel hand and sector for the moon, apertures for day and month, the snap-on back with makers mark numbered 641810, the signed movement jewelled to the centre with 18 jewels, adjusted to heat, cold, isochronism and to five positions, the bi-metallic balance with micrometer regulation, numbered 927644, with brown leather strap and gold Patek buckle