The biggest feature of the Heritage series is the display of movement components, such as splints, gears, escapements, barrels, etc. These components were originally hidden under the main board of the dial, and the movement uses a unique central barrel with the same diameter Balance wheel.IWC Portugal series 'BoutiqueMunich' double rattrapante chronograph limited edition watch Portugal series 'BoutiqueMunich' double rattrapante chronograph limited edition watch (model IW371217) compared with the previous 'BoutiqueMilan', there are still many detailed differences.
The trouble is that the watch is easy to stop and go faster. The specific speed depends on how fast the hairspring is released to the extent that the outer pile is tightly attached. In serious cases, it can be as fast as 2 hours a day.It's time to buy a weighing machine that can weigh 1500g.