1964 NY World's Fair
"New York World's fair 1964-1965 "Peace through Understanding.""
Sinclair Dinoland 1964 World's Fair
"New York World's Fair 1964-65. Featuring nine life-size prehistoric monsters that roamed the earth millions of years ago"
New York World's Fair 1964-65
postcards found among many others here.
UPDATE: I added some snapshots I found from Sinclair Dinoland at Flickr, a couple of images from a book, a Sinclair dino toy, the Sinclair logo, and an ad:
Uploaded to Flickr by califboy101
Taken by Lillian Seymour and uploaded to Flickr by ninecormorants
From Palaeoblog: Sinclair Dinoland 1964-65: Part 1, Sinclair Dinoland 1964-65: Part 2
Gasoline Alley Antiques
Uploaded to Flickr by the owls go