Gap and A.P.C. have unveiled a 37-piece limited-edition menswear, womenswear and accessories collection that combines Gap's American casual heritage with A.P.C.'s Parisian approach, drawing on 1960s cinema, music and art. Launching September 18 from $28 to $328, it will be sold online and at stores worldwide, supported by a Paris-shot short film and launch activations in New York City and Tokyo.