Patek Philippe "Extra" Observatory Chronometer with Certificate
Fine and scarce Patek Philippe 18K gold "Extra" Observatory Chronometer with certificate circa 1909."
Fine white enamel dial with red and black markings and blued steel hands. Plain polish case.
Fine nickel 20 jewel movement with diamond cap jewel, two serial numbers, precision regulator and Guillaume balance.
Excellent example.
"Extra" quality watches were specially adjusted by masters who were the highest "
paid workers in the watch industry. These watches were made to the highest
possible standards and were several times more expensive than the regular
production. Only the very best of these watches were selected for observatory trials.
