 |
| Detail from the front of two 500-ruble notes. The left-hand image shows a plain area below the text in the panel, whereas the right-hand image shows a small rectangle in the centre of the area below the text. The small rectangle is the secret mark. |
|
| Detail from the front of two 500-ruble notes. The left-hand image shows a plain area below the text in the panel, whereas the right-hand image shows a small rectangle in the centre of the area below the text. The small rectangle is the secret mark. |