ELI5: Explain Like I'm 5

State quality mark of the USSR

Okay, so a quality mark is like a sticker or a symbol that tells you that something is really good. It means that the thing has been checked by people who know a lot about it, and they say it meets certain standards.

The Quality Mark of the USSR was a special symbol that was put on products made in the Soviet Union. It was kind of like a stamp of approval. It meant that the product was made really well and was safe to use.

The people who gave out the Quality Mark were from the government. They had special rules about what made a product good enough for the mark. For example, they would check how strong and durable the product was, or whether it was made with good materials. They also checked to make sure that the product wouldn't hurt people in any way.

So, when you saw the Quality Mark of the USSR on a product, you knew that it was made well and would do what it was supposed to do. People felt safe buying things with the Quality Mark on them.