Extra Virgin Olive Oil - Quality Sticker
The Israeli Olive Board has its own unique stamp of quality.
Each olive oil producer in Israel, which is also a member of the Israeli Olive Board, has its own unique serial number printed in the middle of the sticker.
This allows one to track back the origin of the olive oil and keep - to limited extend - quality under control.
The following is an example of how it looks on a bottle I found in the Supermarket: