First Men On The Moon, 1964.. bluray..
In the book, the large monster which the Selenites hunt is called a Mooncalf. This is an old English term for idiot, since it was believed that being out under a full moon could cause madness (think also "lunatic"), but is also a clever pun on H.G. Wells' part, as the Selenites also hunt this beast like cattle, the young of which is called a calf.
Professor Cavor calls out "SOS" when he becomes stuck between the rocks on the moon's surface; however, SOS did not come into use until 1905, six years later.
This is the only one of Ray Harryhausen's films to be shot in anamorphic widescreen (2.35:1) due to the higher cost of anamorphic camera and projection lenses needed for his Dynamation Process.