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Patek Philippe's Pinnacle
Observatory Chronometer "EXTRA"
A custom-designed base plate and bridges specifically for the "EXTRA"
A rare 21-jewel configuration with a hole jewel under the second wheel
The balance end stones are diamond on both the upper and lower sides
High-end barrel with a stop-work device
Wolf's teeth winding wheels
Anchor with a counterweight
The combination of the Guillaume balance and Breguet overcoil hairspring made of blued steel ensures minimal temperature compensation errors
Manufactured in the 1910s and subsequently entered into the 1913 Geneva Observatory Competition, achieving 24th place in the "Chronomètres 1re Classe, 3me Prix" category out of 159 entries
A chronometer database issued by A. Hidding is also included.
An exceptionally rare and remarkably substantial 18k solid gold case from Patek Philippe (total weight 123.7g)
The dial and movement are in flawless condition! Truly a top-tier machine, akin to "F1 specifications"!
Guaranteed practical accuracy: within 5 seconds per day
| Item No | iEp-2331 |
|---|---|
| Maker | Patek Philippe & Co. |
| Item Name | EXTRA Observatory Chronometer Swiss Pocket Watch |
| Circa | c.1910 |
| Serial | 153569 |
| Jewels | 21 Jewels |
| Winding | Manual winding |
| Setting | Crown setting |
| Size | Case diameter approx. 50mm Movement diameter approx. 41mm |
| Case | 18k |
| Dial | Enamel |
| Item Price | (ASK(eMail Only)) |
| (Tax) | - |
| Total Price | (ASK(EMail Only)) |
| Open sale | 07/20/24 |
| Status | ON SALE |
We guarantee our watches for 2 years.(Excluding man-made failures)