Barbie still has the original plastic over her head. Ken is marked 1960, Barbie is 1958, and Midge is 1962. They all have Japan stamped on their feet.
There is no date on the box but is probably 1964 release date. The item "Original Vintage Barbie, Ken & Midge On Parade Gift Set #1014" is in sale since Friday, November 29, 2019.
This item is in the category "Dolls & Bears\Dolls\Barbie Vintage (Pre-1973)\Vintage (Pre-1967)". The seller is "doujoh-97" and is located in Chino Hills, California. This item can be shipped to United States.