Patek Philippe 18K gold Observatory Chronometer with
Observatory Documentation
Extremely fine Patek Philippe 18K gold Observatory Chronometer antique pocket watch with full
observatory documentation circa 1915.
White enamel dial with bold black markings and blued steel Breguet hands.
"Slim plain polish case. First quality nickel 20 jewel "Extra" movement with the serial number "
marked twice, wolf tooth winding, and precision regulator.
Guillaume balance with platinum and gold timing screws.
"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.