The Land That Time Forgot (1974)
Crew or equipment visible
The producers may have been forced to use incorrect pistols because the Navy P-04 is considerably more rare, ironically because many were sent to the bottom of the ocean together with the U-boat crewmen carrying them.
Capt. James Cook is obviously meant. However Capt. Cook wasn't born until 1728 and didn't begin making his voyages of discovery until the late 1760s.