For 6 years, Patek Philippe Advance Research Department has been developing new products started from the lauch of the well-know Gyromax balance wheel which was first mounted in a movement in 1952 after being pantented on May 15, 1949 and secondly on December 31, 1951 with its specialty. Insteadvof weight adjustment screws on the outside of the rim, as in traditional balances, the Gyromax has turn able weight recessed into the top of rim,.After that, new material has been developed and Silinvar was lauched with this special marterial in 2005. Its traditional escape wheel requires no libtracation. A year later,Spiromax , hair spring escapement was released. Then in 2008 came Pulsomax with escapement in Silinvar for more efficient power transmission. These researches and innovations have greatly helped developing the working standard of the watch wold
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