Photo of William Shatner as Kirk and Leonard Nimoy as Spock from the orignal "Star Trek" series used to promote the 1973 animated version.
Date
Not dated. w:Star Trek: The Animated Series began airing on Saturday mornings from 10:30-11 AM in the fall of 1973. While most of the original cast voiced the animations, they did not appear on screen. There were no tapings or filmings of it with live actors from w:Star Trek: The Original Series 1969 until the film ten years later. w:Star Trek (film franchise). The photo dates from 1966-1969, which was the time the original series aired on NBC.
In addition, I conducted various copyright searches on the UPenn site to try determining if any copyrights had been registered.
I searched the complete volumes for film and artwork for the years 1965 to 1969. Desilu Productions registered only w:The Lucy Show and w:Yours, Mine and Ours (1968 film) in conjunction with Walden Films. NBC registered only one still image-a color slide from Bonanza of Ben Cartwright on a horse.
Nothing turned up when I searched Star Trek for the years 1965 through 1969 in either film or artwork.
There's no evidence of copyright for this time frame from either production company.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.