F.P. Journe CT (Pre-owned - Excellent) — USD 349,000 on eBay

The F.P. Journe Centigraphe — known among collectors as the CT — is a landmark chronograph that measures time in centièmes de seconde, hundredths of a second, a capability unique in mechanical watchmaking. Powered by caliber 1506, its patented centesimal mechanism employs a 100-tooth wheel oscillating at 360,000 vph to display 1/100th seconds on a dedicated subdial alongside a 10-minute counter and running seconds. Available in the Souveraine collection in precious metals and as the Centigraphe Sport in aluminum, the CT is produced in limited quantities at F.P. Journe's Geneva manufacture and prized by collectors for its horological ingenuity and benchmark precision chronography.