![Dec. 12, 1972 - Patek Philippe Breakthrough In Electronic Timekeeping: Berne, the swiss federal capital, became also the nation's watch capital for a day when the ''most accurate clock in Berne'' was Dec. 12, 1972 - Patek Philippe Breakthrough In Electronic Timekeeping: Berne, the swiss federal capital, became also the nation's watch capital for a day when the ''most accurate clock in Berne'' was](https://c8.alamy.com/comp/E10J9M/dec-12-1972-patek-philippe-breakthrough-in-electronic-timekeeping-E10J9M.jpg)
Dec. 12, 1972 - Patek Philippe Breakthrough In Electronic Timekeeping: Berne, the swiss federal capital, became also the nation's watch capital for a day when the ''most accurate clock in Berne'' was
![PATEK PHILIPPE | MODEL QM1 ST2/1 QUARTZ-M, A LARGE RECTANGULAR MASTER CLOCK, CIRCA 1970S | Watches | 2020 | Sotheby's PATEK PHILIPPE | MODEL QM1 ST2/1 QUARTZ-M, A LARGE RECTANGULAR MASTER CLOCK, CIRCA 1970S | Watches | 2020 | Sotheby's](https://sothebys-md.brightspotcdn.com/dims4/default/616f744/2147483647/strip/true/crop/2000x2000+0+0/resize/2048x2048!/quality/90/?url=http%3A%2F%2Fsothebys-brightspot.s3.amazonaws.com%2Fmedia-desk%2F3b%2Ffc%2F4bc2210c4ca79d138237a0447a55%2Fbp6ch.jpg)
PATEK PHILIPPE | MODEL QM1 ST2/1 QUARTZ-M, A LARGE RECTANGULAR MASTER CLOCK, CIRCA 1970S | Watches | 2020 | Sotheby's
![Electronic Master Clock & Slave" Patek Philippe, Genève, Model L4031. Made circa 1975. Very fine, Electronic Center Seconds Master Clock and Slave Patek Philippe "Naviquartz" electric center seconds clock. Master: | Important Electronic Master Clock & Slave" Patek Philippe, Genève, Model L4031. Made circa 1975. Very fine, Electronic Center Seconds Master Clock and Slave Patek Philippe "Naviquartz" electric center seconds clock. Master: | Important](https://antiquorum-swiss-assets.s3.us-west-2.amazonaws.com/images/163/lots/546/546.jpg)
Electronic Master Clock & Slave" Patek Philippe, Genève, Model L4031. Made circa 1975. Very fine, Electronic Center Seconds Master Clock and Slave Patek Philippe "Naviquartz" electric center seconds clock. Master: | Important
Patek Philippe Electronic World Time Tower Clock Watch Largest & Oldest One of a Kind! Free Shipping | Martelle International
![Patek Philippe Electronic Master Clock Prototype For Sale at 1stDibs | patek philippe electronic clock, patek philippe master clock, electronic prototype Patek Philippe Electronic Master Clock Prototype For Sale at 1stDibs | patek philippe electronic clock, patek philippe master clock, electronic prototype](https://a.1stdibscdn.com/patek-philippe-electronic-master-clock-prototype-for-sale/f_8911/1538679897751/30_2944_1_master.jpg?width=768)