Sold before it was made
The puzzle
On a certain product, the date it was sold comes before the date it was made.
It is not a counterfeit, and nobody set a clock wrong. How?
See the answer (spoiler)
Spoilers from here on. If you want to work it out yourself, leave this folded and move on.
Answer
It was sold on pre-order.
Orders open first and the item is built only once it has been bought — made-to-order furniture and limited-run trainers work this way.
