![File:Patek Philippe & Hewlett Packard Atomic Clock (circa 1960s) - M.S. Rau Antiques (taken on 2015-03-25 13.19.39 by @DrGarcia).jpg - Wikimedia Commons File:Patek Philippe & Hewlett Packard Atomic Clock (circa 1960s) - M.S. Rau Antiques (taken on 2015-03-25 13.19.39 by @DrGarcia).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/8/8c/Patek_Philippe_%26_Hewlett_Packard_Atomic_Clock_%28circa_1960s%29_-_M.S._Rau_Antiques_%28taken_on_2015-03-25_13.19.39_by_%40DrGarcia%29.jpg)
File:Patek Philippe & Hewlett Packard Atomic Clock (circa 1960s) - M.S. Rau Antiques (taken on 2015-03-25 13.19.39 by @DrGarcia).jpg - Wikimedia Commons
![An Extremely Rare Patek Philippe Perpetual Calendar Chronograph “Pink-on-Pink” Reference 1518 and A Possibly Unique Patek Philippe Perpetual Calendar Chronograph Reference 2499 An Extremely Rare Patek Philippe Perpetual Calendar Chronograph “Pink-on-Pink” Reference 1518 and A Possibly Unique Patek Philippe Perpetual Calendar Chronograph Reference 2499](https://uploads-ssl.webflow.com/5880c2457f92b892427ba1ee/5daf72535bc79dc352e6e9a7_continut12-2.jpg)
An Extremely Rare Patek Philippe Perpetual Calendar Chronograph “Pink-on-Pink” Reference 1518 and A Possibly Unique Patek Philippe Perpetual Calendar Chronograph Reference 2499
![Bonhams : Patek Philippe. A rare integrated Electronic Master Clock System with independent minute and seconds comparators in a five-piece towerCirca 1975 Bonhams : Patek Philippe. A rare integrated Electronic Master Clock System with independent minute and seconds comparators in a five-piece towerCirca 1975](https://images1.bonhams.com/image?src=Images/live/2009-05/07/94442679-1-1.jpg&width=640&height=480&autosizefit=1)
Bonhams : Patek Philippe. A rare integrated Electronic Master Clock System with independent minute and seconds comparators in a five-piece towerCirca 1975
![An Extremely Rare Patek Philippe Perpetual Calendar Chronograph “Pink-on-Pink” Reference 1518 and A Possibly Unique Patek Philippe Perpetual Calendar Chronograph Reference 2499 An Extremely Rare Patek Philippe Perpetual Calendar Chronograph “Pink-on-Pink” Reference 1518 and A Possibly Unique Patek Philippe Perpetual Calendar Chronograph Reference 2499](https://uploads-ssl.webflow.com/5880c2457f92b892427ba1ee/5daf70bef9ffc5e5f20bc504_pjimage-5.jpg)