I do not cut only industrial parts, I take apart lot of objects as well. Same curiosity appeal, and also for the selctive sorting (plastic, scrap metal, copper, electronic ...)

From time to time, we come across surprising things. This telephone from the 1990's, is the perfect example:

Once opened, look at it carefully:

You did not find? A zoom can help:

These are lead weights!

What for?

One of my former colleagues thinks it's to avoid Gaston Lagaffe's gag, the thread not elastic enough: