Factual error: Erik arrives in Argentina at a place called Villa Gesell, shown to be a town in middle of mountains. Villa Gesell is a beach town on the Atlantic Ocean coast, with no mountains.
Continuity mistake: When Mystique is on the exercise table and Erik lifts the bar off her, her right leg changes from stretched out to bent from the different camera shots.
Factual error: The establishing shot of Shaw's boat says they're in Miami. Yet in the scene, we see a very large suspension bridge in the background. The bridge is the St Simons Bridge leading from Brunswick to St. Simons, Georgia.
Continuity mistake: The position of the pig farmer's hand moves after Erik stabs it to the table towards the end of the scene.
Factual error: In the scene where they first pull up to the mutant research facility, they are in a 1972/3 Cadillac when the movie is set in 1962.
Continuity mistake: In the original X-Men film, Xavier mentions that he met Magneto when he was 17. In this film, he doesn't meet him until well into his 20's.
Factual error: In the scene where Xavier meets Raven, in 1944, one of the first shots shows a picture of Albert Einstein taken in 1947. (00:02:25)
Continuity mistake: In a scene where Xavier is pointing a gun at Magneto the distance between the gun and Magneto's head changes between shots.
Other mistake: The knife used in the Argentina pub scene never has any blood on it, despite being driven into one man's stomach and another man's hand-twice.
Visible crew/equipment: In the scene where Sebastian Shaw is revealing the Magneto helmet to Emma Frost in the submarine, you can see the microphone in the helmet's reflection throughout the entire scene.
Factual error: When the US & Soviet navies attack the mutants on the beach they fire a large volley of surface to surface missiles. This is supposed to be 1962, the Cuban Missile Crisis, and ship launched surface to surface missiles had only just been introduced and weren't very common. But what makes this a technical error is that in the barrage we see RGM-84 Harpoon anti-ship missiles, introduced in 1977, and RGM-109 Tomahawk missiles (could be anti-ship or land attack) developed in the 70s and first entering service in 1983.
Other mistake: When Shaw enters the CIA research facility, he grabs a man by the collar and tosses him into the air, yet he never comes back down.
Factual error: A Westland Bell 47G helicopter with the a registration of G-CHOP is seen to land at the Russian army camp/military headquarters when Charles, Magneto and the X-Men are approaching. The registration denotes it is a British aircraft, so unlikely to be in the middle of Russia, and this particular model was built in 1966 - four years after the Cuban missile crisis.
Continuity mistake: In this movie, Emma Frost is seen as an adult woman [roughly around the same age as Professor X and Magneto]. But the character is also in X-Men Origins: Wolverine, set years later when Professor X and Magneto are much older, but in that movie she's younger than she is in this one. Although in Origins she is Kayla Silverfox's sister and her surname is never heard - the character was advertised and created as Emma Frost.
Factual error: When sitting in Xaviers mansion there are cushions on the sofas made from a Sanderson fabric, Dandelion Clocks, this fabric was designed in 2009 but the film is set in 1960.
Factual error: The aquarium in the lounge area of CIA facility where the young mutants gather has several blood parrot cichlids in it. This is a hybrid ornamental fish developed in Taiwan in the mid 1980s and did not exist in 1962.
Factual error: In one scene when Sebastian Shaw talks to Emma Frost in the submarine you can see the TV playing in the background, and right next to it is a Revox A-77 reel to reel machine. This movie is set in 1962, but Revox didn't introduce the A-77 until 1967.
Factual error: There is a pinball machine in the lounge area of the CIA facility where the young mutants gather. The pinball machine's name is "Fun Land", it is a 1 player (1 at a time) machine made by D. Gottlieb and Company in 1968, and did not exist in the film's 1962 timeframe.
Continuity mistake: When Xavier freezes Levene in the hallway he has a jet of water against his lips. In the next shot the jet of water is against his nose even though he didn't move. (00:30:45)
Continuity mistake: After his mother is shot, Erik squashes the bell on the doctor's desk. Its shape is completely different in all subsequent shots. (00:07:50)
Chosen answer: He's not okay with it, but he knows that Erik's views appeal strongly to her. To all intents and purposes, she's already made her decision - to try to stop her would likely only lead to an argument, which is not how he'd want them to part. Plus there is the somewhat major side issue that Charles has just been shot, so it's not really the right time for a discussion on conflicting mutant philosophies.
Tailkinker ★