Important Modern & Vintage Timepieces

Monaco, Jul 21, 2021

LOT 107

Patek Philippe
Ref. 3445, self-winding, date, water-resistant; “Monodate”; 18K white gold

EUR 11,000 - 16,000

USD 13,100 - 19,000 / HKD 102,000 - 148,000

Sold: EUR 22,100

18K white gold, self-winding, round-shaped, gentleman’s wristwatch, with subsidiary seconds at 6 and one horological complication:
• Instantaneous date of the month (aperture at 3 o’clock)

Polished two-piece case, water-resistant with screwed case-back.

Silver colour dial with radial applied white gold indexes.

27-460 M calibre, Gyromax balance, self-compensating Breguet hairspring, adjusted to heat, cold, isochronism and 5 positions, 18K yellow gold rotor, “Poinçon de Genève” (Geneva Quality Hallmark or Geneva seal).

Click to full view

Grading System
Grade: AAA


Case: 2-8

Very good

Slightly scratched

Movement: 2*

Very good

Overhaul recommended, at buyer's expense

Dial: 2-8-01

Very good

Slightly scratched

HANDS Original

Brand Patek Philippe, Geneva

Reference 3445

Year circa 1970

Movement No. 1 117 993

Case No. 328 092 (by Antoine Gerlach, Geneva)

Bracelet Black leather strap

Diameter 35 mm

Caliber 27-460 M

Signature dial, case and movement

Accessories original fitted box; Extract from the Archives


Patek Philippe, Ref. 3445 Monodate
This reference is launched in 1960-1961 and remained in production until the early-1980s.
It’s the first “simple” calendar wristwatch made by Patek Philippe.
The majority in yellow gold, more rarely in rose gold, even more rarely in white gold or in platinum. The cases by Antoine Gerlach, Geneva.
The last watches produced, circa 1980, bear a sapphire screwed case-back (Ref. 3445-100 by Les Ateliers Réunis, Geneva).
Around 3 000 examples were produced, some with integrated bracelet (Ref. 3445-6, etc.).
According to our research, only ten examples of the Ref. 3445 in platinum are known to have appeared on the open market, three of these have diamond-set dials.
· Patrizzi, 2010, vol. 2, pp. 217-218 (Nos. 899-903, similar watches in various metals).

*a 20% import VAT is due on the hammer price with buyer's premium, plus 150€ for termination of temporary export, at buyer's expense, only if it is delivered within the EU