återgraverad IWC portugisiska serien lW546301 tourbillon 43mm diameter.

IWC Portuguese series lW546301 Tourbillon 43mm 98900 type movement watch yl in pursuit of 1:1 perfect reproduction 1 table mirror is double-sided anti-reflective pot cover sapphire mirror 2 Movement balance wheel Glucydur@* Beryllium alloy balance wheel balance wheel arm with high-precision fine-tuning cam 3 98900 movement is the only tourbillon on the market that lasts for 7 days 4 characters and sizes are as smooth and round as the original 5 buckle It is also the latest snap movement launched by IWC in 2016. The vibration frequency is 28,800 vibrations per hour.