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Patek Philippe Perpetual Calendar
Analog:Shift Two-Year Warranty

Analog:Shift Two-Year Warranty
Authorized Luxury Retailer

Renowned for expertise in luxury watch retail, Watches of Switzerland embodies the highest standards of craftsmanship and service. With a history dating back to the 1700s, the company offers a curated selection of premier timepieces and commits to excellence in customer experience grounded in a legacy of trust and industry proficiency.
Authorized Luxury Retailer
Free Expedited Delivery

Free Expedited Delivery on Orders $100 and Up (Estimated 1-3 Days)
Our secure shipping service operates Monday through Saturday, from 8:00 a.m. to 6:00 p.m. For security reasons, an adult signature is required for every delivery. Watches of Switzerland does not deliver to P.O. boxes or third-party forwarding services. For more information about delivery, click here. Tracking information will be made available upon shipping.
$15 Flat Fee on Orders Under $100 (Estimated 1 - 2 weeks)
Monday through Saturday, from 8:00 a.m. to 6:00 p.m. For more information about delivery, click here. Tracking information will be made available upon shipping.
If you have any questions or concerns regarding your order, please contact the Watches of Switzerland Client Services.
Free Expedited Delivery
Simple Easy Returns

Our commitment to you does not end at delivery. We offer the following return services to make your experience as pleasant as possible.
10-Day Returns For Timepieces:
Timepieces purchased online can be returned or exchanged within 10 days from when they are shipped or collected.
30-Day Returns For All Other Purchases:
All other online purchases can be returned or exchanged within 30 days from when they are shipped or collected.
On presentation of the original receipt, your purchases may be returned or exchanged at any of our store locations. Alternatively, you may elect shipping to our facility with all the original paperwork. All refunds must be credited to the same tender used for the original purchase. To return the online purchases through secure shipping service, please contact our client service team who will provide you the shipping label.
All returns or exchanges must be in new, unworn condition, with no scratches or markings, not sized or adjusted and in their original packaging and with warranty cards / certificated and instruction booklets.
Simple Easy Returns
Details
What you’re looking at is arguably one of the most beautiful perpetual calendar watches ever made, full stop. And perhaps one of the most important, too.
The reference 3940 was born in 1985, at a time when the watch world was in the midst of the Quartz Crisis and most brands were churning out inexpensive, battery-powered watches — and struggling to stay afloat. Alas, Patek Philippe was never one to follow the crowd, and released the ref. 3940 perpetual calendar with an in-house, micro-rotor-equipped automatic movement — a gauntlet drop if ever there was one.
Made in several series and different metals, the watch we have here is in fact not a 3940. Housed in a 36mm white gold case, this piece is lugless, and set on a bracelet instead of a strap. Bearing the legendary reference 3945, it features a sapphire crystal, signed crown, a polished bezel, and one hell of a dial: Silver with white gold dauphine hands, it has a combination month/leap year indicator at 3 o’clock; a moon phase/date wheel at 6 o’clock; and a day/24-hour indicator at 9 o’clock. Simple, elegant and refined, it’s a design that was positively revolutionary in the 1980s, and still looks stunning today.
This 3945/1G is powered by the in-house Patek Philippe Calibre 240Q movement with micro rotor, and comes equipped with a beautiful Patek Philippe integrated 18K white gold bracelet with Patek locking clasp.
Exquisite.
If you’ve always appreciated the significance and beauty of the 3940, but desired something with a bit more character and flair (if that’s possible), look no further than the 3945, one of the rarest, and most beautiful references in Patek’s storied historical catalog.
General
Condition
Pre-Owned
Brand
Patek Philippe
Reference
40930470/AS09927
Product Code
40930470
Features
Automatic movement
Case
Case Size
36 mm
Case Shape
Round
Case Material
18Ct White Gold
Bezel Material
18ct White Gold
Crystal
Sapphire
Dial
Dial Color
White
Dial Markers
Dots and Batons
Stone Set
No
Movement
Type
Auto
Bracelet
Type
Bracelet