the difference between the 3rd and 4th series 3970 lies in the serial numbering of the watches. The series 4 watches came directly from the factory with a deployant clasp, but the series 3 watches also cam with the same clasp. Someone here on the Forum is going to know for certain. I was never able
The great news is, that you know the people in the Patek Restorations Department gave your watch the care and attention that it deserves! Congratulations!
There is also an interesting article very specific to the 3940 available online at “The Collected Man” website. I just found it. They talk about the case suppliers for the 3940 along with its entire history of manufacture. Fortunately , there were around 7,000 ( or more) examples of the 3940 built o
During my enforced “Down Time” because of the pandemic, I have been reading-up and studying whatever I can find about vintage Patek Philippe. The early Perpetual Calendars and Perpetual Calendar Chronographs were made by Patek Philippe utilizing different components and ebauche movements from compan