Fashion is one of the best identifiers of when a photo was taken. And if the wardrobe is just a little more fab or eccentric, you might assume it was also taken in San Francisco. For this week's throwback, we present a century of style in the city.

1970s: Model Merle Bulatao stands chic in Chinatown, wearing a green Guatemalan pantdress by designer Kaisik Wong. The brown tones, pattern, boots, and hair/makeup are so '70s. (via de Young/Legion of Honor)