A gun-toting trio robbed a man of his $30,000 Cartier Santos watch in Manhattan over the weekend — after foiling the victim’s attempt to save his pricey timepiece and flee in a taxi, cops said.

The 46-year-old victim was walking on West 37th Street near Dyer Avenue in Hudson Yards around 5:15 p.m. Saturday when three suspects stormed up to him and demanded the pricey watch, authorities said.

The quick-thinking watch-wearer tried to get away by hopping into a taxi – but his undeterred pursuers chased after the cab, police said. 3

Once they caught up, they flashed a gun and snatched the watch from the victim, cops said.

The high-end thieves had not been caught by Tuesday, police said.

Two of them were wearing face masks, one pulled down, according to surveillance footage. One is sh

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