Important Modern & Vintage Timepieces

Hong Kong, May 10, 2020

LOT 390

Patek Philippe - Ref. 3445, water-resistant, date; platinum

HKD 344,000 - 430,000

USD 44,000 - 56,000 / EUR 40,000 - 50,000 / CHF 44,000 - 56,000

Platinum, 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, Geneva Quality Hall Mark.


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Grading System
Grade:
Case: 3

Good
Movement: 2 *
Dial: 2-01

Very good

HANDS Original

Brand Patek Philippe, Geneva

Reference 3445

Year circa 1967-1968

Movement No. 1 125 172

Case No. 319 740 (by Antoine Gerlach, Geneva)

Material platinum

Bracelet black leather strap

Buckle platinum Patek Philippe buckle

Diameter 35 mm.

Caliber 27-460 M, adjusted to heat, cold isochronism and 5 positions, 18K yellow gold rotor, Geneva Quality Hall Mark

Signature dial, case and movement

Accessories repair invoice (dated Paris, April 7, 2011)

Notes

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 platinum.
The last watches produced, circa 1980, bear a sapphire screwed case-back (Ref. 3445-100 by Les Ateliers Réunis, Geneva; key No. 28).
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.

Bibliography

Patrizzi, 2010, vol. 2, pp. 217-218 (Nos. 899-903, similar watches in various metals).