Production equipment clearly visible at end of opening scene, when Tristram (Patrick Troughton) rides away from Romans in chariot. Look for a light blue cloth covering a cart of white and stainless steel objects, perhaps the film crew's lunch wagon, just as the chariot turns away.
The fact of a soldier wearing a wristwatch has passed into movie folklore as the favorite goof of many moviegoers. Similar stories are told of Ben Hur (1959) and Spartacus (1960). For The Viking Queen no still or precise reference has ever been found, and it is likely that the story is either apocryphal or that one of the wristbands worn by the soldiers was mistaken for a wristwatch.