Please consider donating to help offset our high running costs.
It's easy, although Universal Geneve owned a small percentage of Martel (the house that made most of the UG chrono movements), Martel, sold movements to many other Swiss watch makers (Jaeger, Girard Peregaux, Cartier, Zenith and Movado are some}. I believe that although martel did not directly provide movements to Patek Phillipe, they did provide expertise and technology to build their in house movements.
Ok but the value of these extracts is 0 IMHO
This watch was IMHO produced by UG. The reference, serial and movement serial fit exactly into the UG production table