Seemingly simple no one person could ever forge one with his or her hands alone.
However, if one were to save outside of a location with amber sources, having never entered the location before, they are able to reload this save and search the sources until the oddity is found.
But there are more beneficial inventions that should be remembered in the post-collapse world.
Their numbers had become unmanageable and the health of the cat population was now a major concern — some were quite feral, and they were getting into storerooms and causing damage.
Antibiotics and other medications are taken for granted until they are no longer available.
There was a motorcycle, a snow globe, and a comic book.