IWC Da Vinci Perpetual Calendar Chrono Yellow Gold Reference 3750A classic with unusual lugsThe IWC Da Vinci reference 3750 was launched by IWC in the 1985 and was seen as a daring move launching a complicated mechanical watch in the era of quartz watches. The design, however, was forward thinking with a classical case styled with interesting lugs that IWC hoped would appeal to a younger audience who deemed mechanical complications as old fashioned. The watch is housed in a 38mm yellow gold step case with step that