840
An exceptional and highly important yellow gold open face one-minute tourbillon “Extra” pocket chronometer, with James C. Pellaton tourbillon carriage, recipient of the first class prize at the Geneva 1929 Observatory timing competition, and Honorable mention in 1931
1929
47.5mm diameter
Case, dial and movement signed, dial numbered
Estimate
HK$1,000,000 - 1,500,000
€110,000-166,000
$128,000-192,000
Sold for HK$3,280,000