Important Modern & Vintage Timepieces

Monaco, Jul 21, 2021

LOT 109

Patek Philippe
Ref. 3940 J, self-winding, bissextile perpetual calendar, moon phases, AM-PM; 18K yellow gold

EUR 22,000 - 32,000

USD 26,200 - 38,000 / HKD 204,000 - 296,000

Sold: EUR 37,700

Very fine and very rare, 18K yellow gold, self-winding, tonneau-shaped, gentleman’s wristwatch, sapphire-crystal screwed case-back, silver colour dial, with perpetual calendar (date, day, month), leap-year, moon phases, AM-PM indication.

Grading System
Grade: AAA


Case: 2

Very good

Movement: 2*

Very good

Overhaul recommended, at buyer's expense

Dial: 2-01

Very good

HANDS Original

Brand Patek Philippe, Geneva

Reference 3940 J

Year 1993

Movement No. 773 083

Case No. 2 891 015

Bracelet leather strap

Buckle 18K yellow gold PP deployant clasp

Diameter 36 mm

Caliber 240 Q

Weight 68.06 gr. (approx.)

Signature dial, case and movement

Accessories original fitted box


Patek Philippe, Reference 3940 and Reference 3941
This reference is launched in1985 and remained in production until circa 2007.

At the time of its creation, this watch replaced the Reference 3450. The new reference is equipped with a new calibre with an oscillating weight – the micro-rotor – incorporated into the height of the movement; the result is a watch that is flatter than its predecessor.

The watch is fitted first with the Cal. 240 Q aut., with 22K yellow gold micro-rotor, then, circa 1998, with an improved version, the Cal. 240-114 (Q).

When Patek Philippe first launched this new series of watches, Ref. 3940 was the model bearing a metallic snap-on case-back, while Ref. 3941 was equipped with a screwed sapphire-crystal case-back. Very soon, the reference number of this model was standardised to Ref. 3940, sold either with one or two screwed backs; one of these backs could be a screwed metallic case-back, while the second, (non-compulsory), a screwed sapphire crystal case-back. In consequence, very few examples bear the Ref. 3941.

The total production is about 7000 examples over almost 22 years.


• Huber, Martin, & Banbery, Alan, Patek Philippe Wristwatches, 1998, p. 292-293, ill. 451 a-d and p. 294, ill. 452 (colour photos and technical drawings).