Launched in 1981, reference 3450 was the successor to reference 3448 - Patek Philippe's very first automatic perpetual calendar wristwatch. While aesthetically similar to reference 3448, it most notably features a leap year indicator on the dial. In addition, its case back is slightly smaller and is fitted with a "tongue", enabling it to be easily removed. It in fact is the first serially made Patek Philippe wristwatch featuring leap year indication allowing for an easier setting of the exact date; earlier models required a potentially very lengthy synchronisation procedure to manually identify the leap year and then advance to the current year in the cycle.

Ref Variations: 3450A ,3450/1 ,3450/4 ,3450J ,3450/4J ,3450 Q ,