In Pearl Harbor (2001): from one scene where the nurses are on a transport ship, you can see the USS Arizona memorial in the background (wasn't built until after the war in 1962) if you look closely even though the movie is set in WWII. That's not the only historical anachronism I've seen: a speed boat during a romance scene (not available until 1950s) plus incorrect aircraft variants (too modern for 1941).

The naval vessels docked are definitely NOT from 1941 as I can see they're too advanced (like comm towers) for that era (Michael Bay definitely didn't do his homework). He basically remade Titanic (yes, it has romance involving Ben Affleck & Kate Beckinsale) with a WWII skin on it. The flashback sequence at the start depicting 1923 features a crop duster (not commercially available until the 1930s).

back to the future 3

Memphis Belle (1990) - set in 1943, but at one point you can clearly see 'tramlines' - unsown strips - in a wheat field, which did not come into use until the 1960s.

Maybe all 3? Haha

The Thing (2011) feels incredibly out of place because everyone is wearing modern clothes.

In Once Upon A Time... in Hollywood, which is set in 1969, there's a close-up scene of a turntable with what looks like an Audio Technica AT3600L cartridge installed. As far as I can tell the 3600(L) didn't come out until the late 70s.

Edit: On second thought, the 3600L looks pretty similar to the ATP-1, which came out in 1962.

While that wasn't the point of the movie at the time it was made, I do think that it's fun to look at past futurism to see how much it diverges from reality.

Granted, the Back to The Future series wasn't about very serious predictions, but even so...

in some of the shots you can see a car even though it's the old west