The short version The archive turns up 23 records, most of them around Andean colonial city, possibly Ecuador and Andean South America (possibly Arequipa, Peru). 20 are confidently dated; the other 3 are educated guesses — about as precise as it sounds. All are free to use.
Car Body in Assembly Shop, 1960s 1960 Yukon River Stern-Wheeler, 1960s 1960–1969 · Yukon River, Canadian North Snowmelt in the Spruce, Northern Bush Road, 1960s 1960–1969 · Northern boreal forest, possibly Alaska or northern Canada Redwood Grove Roadside, Northern California, 1960s 1960–1969 · Northern California redwood corridor Sugarloaf Mountain Through a Palm, Rio de Janeiro, 1960s 1960–1969 · Rio de Janeiro, Brazil Posing at the International Building, Rockefeller Center, New York, 1960s 1960–1969 · Rockefeller Center, New York City Textile Porter and Curious Crowd, Andean Street, 1960s 1960–1969 · Andean South America (possibly Arequipa, Peru) Chaac Mask Facade, Codz Poop Palace, Kabah, Yucatan, 1960s 1960–1969 · Kabah, Yucatan, Mexico Highland Market Bargaining, Guatemala, 1960s 1960–1969 · Guatemalan Highlands Cloister Courtyard Through a Colonial Archway, Andes, 1960s 1960–1969 · Andean colonial city, possibly Ecuador Kaiser Wilhelm Memorial Church and New Tower, West Berlin, 1960s 1960–1969 · Berlin, Germany Trapezoidal Doorway Framing the Ruins, Machu Picchu, 1960s 1960–1969 · Machu Picchu, Peru Working Dog on a Chain, Nordic Summer Camp, 1960s 1960–1969 The Freedom Bell Plaque, Rathaus Schöneberg, West Berlin, 1960s 1960–1969 · Rathaus Schöneberg, Berlin Baiting the Hook, Lakeside Boat, 1960s 1960–1969 Dutch Smock Windmill on Its Stage, Netherlands, 1960s 1960–1969 · Netherlands Mile 1523 Alaska Highway Terminus Sign, Fairbanks, 1960s 1960–1969 · Fairbanks, Alaska Bronze Age Gold Discs and Spearheads in a Museum Case, 1960s 1960–1969 Tourist at a Balkan Ruin, 1960s 1960–1969 · Balkan region Flatfish on Sand, 1960s 1960–1969 Cenote or Spring-Fed Pool, Yucatan, 1960s 1960–1969 Cenote or Subtropical Spring, Aerial View, circa 1960s-1970s 1960–1975 Forested River Valley with Pasture, Appalachian Region, 1970s 1968–1978
certain inferred low confidence