THE LAND UNKNOWN, a comic book adaptation of a science fiction lost world movie of the '50s, is another of my favorite silver age comic books. The movie may be "B", but the comic book is "A", based on artwork by Alex Toth.
Dell's Movie Comics were produced well ahead of a movie's release, so writers usually worked from an early version of the script. I don't remember the movie so I can't tell you any differences in the story. The most noticeable is that Toth didn't attempt to draw the actors' faces.
The 15¢ price on the cover was a marketing test by Dell to see if they could raise the price of their comics. They would put the higher price on copies sold in certain areas of the country, then compare sales figures. There was much resistance from comic buyers to a price hike. Western Publishing, which produced the comics for Dell, didn't officially raise their price to 15¢ until other publishers raised their prices over a decade later.
THE LAND UNKNOWN, Dell Four Color #845. Copyright © 1957 Universal Pictures Corporation, Inc.