Tiffany & Co., a gentleman's gold wristwatch

Tiffany & Co., a gentleman's gold wristwatch, 'Atlas', ref. M6930, the plain gold dial with blackened hands and date wheel aperture, within a bezel bordered by Roman numerals, to a leather strap, case width 3.6cm, automatic movement, dial, case back and buckle signed Tiffany & Co., numbered M6390, 19-158, Swiss assay mark for 18ct gold, pouch stamped Tiffany & Co.