Did you get it right?
This old neighborhood pharmacy has two small details that do not fit the period.

The Answer
The correct answer is: The mistakes are the child-resistant ribbed cap and the peel-off prescription-label backing..
Here is why
- The ribbed child-resistant cap is on the amber bottle in the pharmacist’s right hand.
- A peeled white label-backing corner appears on the Johnson paper bag.
- Both are newer packaging details hidden among period bottles and paper sacks.
Why people miss it
The eye accepts anything bottle- or paper-shaped as normal pharmacy clutter.
What answer did you get before checking?