IWC Portofino Hand-Wound Eight Days Watch, 45mm White Dial, IW510107You can look forward to this little ritual all week long: winding your Portofino by hand to provide the timepiece with energy for the next eight days. In the Portofino Hand Wound Eight Days, the IWC manufactured 59210 calibre movement will run precisely and reliably for a full 192 hours, or 8 days, before it automatically stops. Strictly speaking, it is 9 days, but the extra day in reserve ensures that the movement maintains as constant a driving