IWC · Automatic

51113

The seven-day Pellaton automatic made for the Big Ingenieur, with a pierced rotor carrying the IWC logo in gold. It is all but identical to the 51111 of the Big Pilot; the difference is that the 51111 sits inside a soft-iron cage against magnetism while the 51113 does without one, the Big Ingenieur's oversized case providing that protection itself.