Did you get it right?
Two modern material details do not fit this 1950s hardware stockroom.

The Answer
The correct answer is: the molded soft-grip tool handle and the peel-and-seal adhesive strip.
Here is why
- The black-and-red tool handle on the left wall has a modern molded finger-contour grip.
- The paper parts pouch near the front-right has a pressure-sensitive peel-and-seal strip across its flap.
Why people miss it
The modern handle hangs among many old wooden tools, and the adhesive strip resembles an ordinary paper label.
What answer did you get before checking?