Ref. 3448 Produced in 586 examples from 1962 to 1982, with the caliber 27-460 Q, the majority in yellow gold, rarely in pink or white gold. This series began with the serial number 1119000. The present wristwatch is one of a small series of watches made by Patek Philippe, featuring special prototype dials without moon phases. This watch is one of only six known today: one, in yellow gold, was sold by Antiquorum on ovember 19, 2000, lot 276; a second in yellow gold was sold in June 2003, lot 394. One in white gold was sold by Antiquorum in April 2004, lot 170, the fourth is the present watch. A similar wristwatch with this reference is illustrated on page 289 of the 1998 edition of the Patek Philippe book and is mentioned as having been modified by taking out the moon phases and adding a dial, concentric to the days of the month graduation, for the leap year indication. A unique example of this reference is known to date in platinum. Its movement was made in 1973 and, at the request of the owner, it was cased in platinum by Patek Philippe, with sapphire indexes on the dial, and was delivered on January 9, 1997. This watch was sold by Antiquorum Geneva on April 18-19, 1998, lot 199.