89
Ref. 11C
A unique, important, and cutting-edge platinum prototype wristwatch with detent escapement, power reserve, black dial, guarantee, chronometer certificate, and presentation box
Circa 2011
41mm Diameter
Case, dial, movement, and clasp signed.
Estimate
$20,000 - 40,000
CHF18,100-36,300
€18,500-37,100
HK$156,000-312,000
Sold for $152,400