Did you get it right?
Two modern details slipped into this 1950s bus depot lunch counter.

The Answer
The correct answer is: the plastic coffee-cup lid and the barcode luggage tag.
Here is why
- A modern plastic coffee-cup lid is sitting on the counter near the cup.
- A barcode luggage tag is hanging from the suitcase in the lower-right corner.
Why people miss it
Both clues are near things that belong in a bus depot, so they feel normal until you check the era.
What answer did you get before checking?