Did you get it right?
This 1950s bowling-alley puzzle shows rental shoes, score pencils, paper score sheets, shoe tags, bowling balls, and a polished counter. Two small details do not fit the period.

The Answer
The correct answer is: The modern gel heel pad tucked inside one rental shoe and the plastic snap-off shoe-tag fastener mixed with the paper size tags are the two mistakes.
Here is why
- The rental shoes, paper score sheets, pencils, and old counter all fit the 1950s bowling scene.
- Look inside the shoe instead of only scanning the counter.
- The gel heel pad and plastic snap-off fastener are the two modern material clues.
Why people miss it
Rental counters are full of tags, laces, leather, paper, and shadows, so small shoe-care details can blend into the ordinary mess.
What answer did you get before checking?