A thief stole a $1,690 bag from the Gucci store inside Trump Tower, cops said.

The suspect walked into the 5th Avenue store at about 5:20 p.m. on Oct. 2 and nimbly pocketed the pricey bag, authorities said.

Surveillance cameras caught him on video as he walked out, cops said.

The thief is described as man with a bowl haircut, who was last seen wearing dark glasses.