File:Hidden watermark.jpg
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Summary
| Description |
English: An electron micrograph of a hidden watermark on CCD filter from 1976. The watermark is a latin inscription naming the researchers and their supervisor and the year: Carolus Paulusque fecit Vanna pinxit Anno Domini MCMLXXVI GC. Lecchi Pontifex Maximus.
Image kindly donated by prof. Giuseppe Ferla. |
| Date | |
| Source | Own work |
| Author | Squidonius |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:47, 17 August 2011 | | 570 × 458 (86 KB) | Squidonius |
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