This is an original second draft script for Star Trek IV dated November 18th 1985. It bears the early working title The Adventure Continues and is hand numbered on every page to prevent unauthorized copying. A master list was kept by the production so they could trace any leak back to a single person.
There are many interesting differences between this draft and the final movie. The whales are called Adam and Evie, many of the lines are given to different characters, Saavik discusses her and Spock's child with Kirk, Sulu's full chopper scenes are here too explaining why they were racing to the roof of the hospital, and there is even an F word for good measure!
The script is clean and shows some yellowing from age but is in otherwise excellent condition.