Description Tiffany and Co 18 K Diamond and Enamel Ladies Pocket Watch with Chain, Made by Koehn. Chain measures 22 inches long, watch measures 1 1/8 inches in diameter. Inscribed within, Made for Tiffany and Co by Ed Koehn, Switzerland, 18 Kt, Minerva Hallmark, 84071. Some loss of enamel around edges of watch.