Swedish model Tilda Lindstam, after Carven, Paris, October 2015.
The more summery version of the look Tilda wore back during the winter here. 
Recreate Tilda's look (kind of):
White button-down shirt: ASOS Smart Boyfriend white shirt, Saint Laurent cotton-poplin shirt, Equipment Kenton blouse, Topshop 70's Collar shirt, Equipment Margaux blouse or Victoria, Victoria Beckham white button down shirt
Neck scarf: Chan Luu Handkerchief scarf, Rockins Printed silk crepe scarf, Gucci Floral-print silk twill scarf, Rockins Super Skinny Peacock Eyes silk scarf, Topshop super skinny scarf, Monki skinny scarf or Rockins Super Skinny Floral scarf