Visible crew/equipment: When the sea monster is coming to kill the giant near the end, for one frame you can see a piece of equipment next to it.
Jack the Giant Killer (1962)
1 visible crew/equipment mistake - chronological order
Directed by: Nathan Juran
Starring: Torin Thatcher, Kerwin Mathews, Judi Meredith, Walter Burke
Continuity mistake: When Jack is aboard the boat at the end of the film, the dragon drops a rock into the water. The water splashes into the boat soaking everyone. The front of Princess Elane's dress is wet, but in the next couple of shots it is completely dry.